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2024 105102

B.Tech 1st Semester Examination, 2024 (Old)

Time 03 Hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Q.1 Choose the correct answer the following (Any seven question only):

Q1.1

The curvature of a straight line is:

a)

Infinity

b)

Zero

c)

One

d)

Length of the straight line

Q1.2

The surface area of a solid of revolution generated by rotating $ y=f(x) $ about the x-axis is given by:

a)

ab2πf(x)dx\int_{a}^{b}2\pi f(x)dx

b)

abπf(x)2dx\int_{a}^{b}\pi f(x)^{2}dx

c)

ab2πf(x)1+f(x)2dx\int_{a}^{b}2\pi f(x)\sqrt{1+f^{\prime}(x)^{2}}dx

d)

abf(x)dx\int_{a}^{b}f(x)dx

Q1.3

Let f be twice differentiable and suppose that $ f^{\prime}(c)=0 $. Which condition indicates that f has a local minimum at $ x=c $?

a)

f^{\prime\prime}(c) > 0

b)

f^{\prime\prime}(c) < 0

c)

f(c)=0f^{\prime\prime}(c) = 0

d)

f(c)f^{\prime\prime}(c) does not exist

Q1.4

Evaluate the limit: $ \lim_{x\rightarrow0}\frac{1-\cos x}{x^{2}} $

a)

0

b)

1

c)

12\frac{1}{2}

d)

2

Q1.5

Parseval's theorem for a Fourier series relates the Fourier coefficients to the energy of the function. Which statement best describes Parseval's theorem?

a)

The sum of the Fourier coefficients equals the average value of f(x).

b)

The sum of the squares of the Fourier coefficients equals (up to a constant) the integral of (f(x)2)(f(x)^2) over one period.

c)

The sum of the squares of the Fourier coefficients is proportional to the maximum value of f(x).

d)

Parseval's theorem provides the Fourier coefficients for discontinuous functions.

Q1.6

Which of the following is the correct Taylor series expansion for $ \ln(1+x) $ valid for $ |x|<1 $?

a)

ln(1+x)=xx22+x33x44\ln(1+x)=x-\frac{x^{2}}{2}+\frac{x^{3}}{3}-\frac{x^{4}}{4} \dots

b)

ln(1+x)=x+x22+x33+\ln(1+x)=x+\frac{x^{2}}{2}+\frac{x^{3}}{3}+\dots

c)

ln(1+x)=1xx22+\ln(1+x)=1-x-\frac{x^{2}}{2}+ \dots

d)

ln(1+x)=xx2+x3x4\ln(1+x)=x-x^{2}+x^{3}-x^{4}

Q1.7

Let $ f(x,y)=\frac{x+y}{x-y} $ if $ x \ne y $, and 0 if $ x=y $. For which points on the line $ x=y $ is $ f(x,y) $ continuous?

a)

f is continuous at every point on x=yx=y.

b)

f is continuous only at the origin (0,0).

c)

f is continuous at all points on x=yx=y except when x0x \ne 0.

d)

f is discontinuous everywhere on x=yx=y.

Q1.8

Let $ f(x,y)=e^{xy} $. Which of the following best describes the total derivative of f at a point (a, b)?

a)

The total derivative exists if the partial derivatives exist, regardless of continuity.

b)

The total derivative is given by df=eab(bdx+ady)df=e^{ab}(b dx + a dy) evaluated at (a, b).

c)

f is differentiable only if its partial derivatives are continuous.

d)

The existence of one zero partial derivative implies the total derivative does not exist.

Q1.9

Let A be a $ 5 \times 7 $ matrix with $ rank(A)=4 $. According to the Rank-Nullity Theorem, what is the dimension (nullity) of the null space?

a)

1

b)

3

c)

14\frac{1}{4}

d)

7

Q1.10

Consider the system $ \begin{cases}x+y=5\\ 2x+2y=10\end{cases} $. Which of the following best describes the solution set of the system?

a)

A unique solution

b)

No solution

c)

Infinitely many solutions

d)

A solution only exists for x=yx=y

Q.2 Solve both questions :

Q2.1

Show that the Gamma function satisfies $ \Gamma(n+1)=n! $ For positive integers n.

Q2.2

Find the volume of the solid obtained by rotating the curve $ y=x^{2} $ about the x-axis from $ x=0 $ to $ x=a $.

Q.3 Solve both questions :

Q3.1

Evaluate the improper integral $ \int_{0}^{\infty}e^{-ax}\sin bx~dx $ where $ a>0 $ and $ b>0 $.

Q3.2

Let $ f(x)=x(x-3)^{2}, x\in\mathbb{R} $.
i. Show that f is continuous on [0,3] and differentiable on (0,3).
ii. Verify that $ f(0)=f(3) $.
iii. Use Rolle's Theorem to show that there exists at least one c in (0,3) such that $ f^{\prime}(c)=0 $. Find the value of c.

Q.4 Solve both questions :

Q4.1

Evaluate the limit $ \lim_{x\rightarrow0}\frac{\tan x-x}{x^{3}} $. Provide a detailed step-by-step application of L'Hôpital's rule.

Q4.2

Consider the function $ f(x)=x^{3}-6x^{2}+9x+5 $.
1. Find the critical points of f by solving $ f^{\prime}(x)=0 $.
2. Determine the nature (local maximum or minimum) of each critical point using the second derivative test.
3. Find the absolute maximum and minimum of f on the closed interval [0, 5].

Q.5 Solve both questions :

Q5.1

Consider the series $ \Sigma_{n=1}^{\infty}\frac{(-1)^{n}\sqrt{n}}{n+1} $.
(i) Use the Alternating Series Test to show that the series converges.
(ii) Determine whether the series converges absolutely or only conditionally.

Q5.2

Write the Maclaurin series for $ \sin x $ up to (and including) the $ x^{5} $ term. Derive the Maclaurin series for $ \ln(1+x) $ and state its interval of convergence.

Q.6 Solve both questions :

Q6.1

Consider the function $ f(x)=x $, $ 0

Q6.2

Let $ A=\begin{bmatrix}1&2&3\\ 0&1&4\\ 5&6&0\end{bmatrix} $.
i. Compute the determinant of A to verify whether A is invertible.
ii. Find the inverse of A.
iii. Determine the rank of A and use the Rank-Nullity theorem to find the nullity of the associated linear transformation $ T:\mathbb{R}^{3}\rightarrow\mathbb{R}^{3} $ defined by $ T(x)=Ax $.

Q.7 Solve both questions :

Q7.1

Let $ M=\begin{bmatrix}2&1\\ 1&2\end{bmatrix} $.
i. Show that M is symmetric.
ii. Find the eigenvalues and corresponding eigenvectors of M.
iii. Diagonalize M: that is, express it in the form $ M=PDP^{-1} $ where D is diagonal.

Q7.2

Find and classify the critical points of the function $ f(x,y)=x^{3}-3xy $.

Q.8 Solve both questions :

Q8.1

Find the maximum and minimum values of $ f(x,y)=x+2y $ subject to the constraint $ g(x,y)=x^{2}-9=0 $.

Q8.2

Consider the series $ \sum_{n=2}^{\infty}\frac{1}{n(\ln n)^{p}}, p>0 $.
(i) Show that the function $ f(x)=\frac{1}{x(\ln x)^{p}}, x\ge2 $ is positive, continuous, and decreasing.
(ii) Use the Integral Test to determine for which values of p the series converges.

Q.9 Write short notes on any two of the following:

Q9.1
a)

Gradient, curl and divergence with applications.

b)

Evaluation of definite and improper integrals with applications.

c)

Applications of definite integrals to evaluate surface areas and volumes of revolutions.

d)

System of linear equations with applications.


2024 V2 105102

B.Tech 1st Semester Examination, 2024 (Old)

Time 03 Hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Q.1 Choose the correct answer the following (Any seven question only):

Q1.1

The curvature of a straight line is:

a)

Infinity

b)

Zero

c)

One

d)

Length of the straight line

Q1.2

The surface area of a solid of revolution generated by rotating y=f(x)y=f(x) about the x-axis is given by:

a)

ab2πf(x)dx\int_{a}^{b}2\pi f(x)dx

b)

abπf(x)2dx\int_{a}^{b}\pi f(x)^{2}dx

c)

ab2πf(x)1+f(x)2dx\int_{a}^{b}2\pi f(x)\sqrt{1+f^{\prime}(x)^{2}}dx

d)

abf(x)dx\int_{a}^{b}f(x)dx

Q1.3

Let f be twice differentiable and suppose that f(c)=0f^{\prime}(c)=0. Which condition indicates that f has a local minimum at x=cx=c?

a)

f^{\prime\prime}(c) &gt; 0

b)

f^{\prime\prime}(c) &lt; 0

c)

f(c)=0f^{\prime\prime}(c) = 0

d)

f(c)f^{\prime\prime}(c) does not exist

Q1.4

Evaluate the limit: limx01cosxx2\lim_{x\rightarrow0}\frac{1-\cos x}{x^{2}}

a)

0

b)

1

c)

12\frac{1}{2}

d)

2

Q1.5

Parseval's theorem for a Fourier series relates the Fourier coefficients to the energy of the function. Which statement best describes Parseval's theorem?

a)

The sum of the Fourier coefficients equals the average value of f(x).

b)

The sum of the squares of the Fourier coefficients equals (up to a constant) the integral of (f(x)2)(f(x)^2) over one period.

c)

The sum of the squares of the Fourier coefficients is proportional to the maximum value of f(x).

d)

Parseval's theorem provides the Fourier coefficients for discontinuous functions.

Q1.6

Which of the following is the correct Taylor series expansion for ln(1+x)\ln(1+x) valid for $ |x|<1 $?

a)

ln(1+x)=xx22+x33x44\ln(1+x)=x-\frac{x^{2}}{2}+\frac{x^{3}}{3}-\frac{x^{4}}{4} \dots

b)

ln(1+x)=x+x22+x33+\ln(1+x)=x+\frac{x^{2}}{2}+\frac{x^{3}}{3}+\dots

c)

ln(1+x)=1xx22+\ln(1+x)=1-x-\frac{x^{2}}{2}+ \dots

d)

ln(1+x)=xx2+x3x4\ln(1+x)=x-x^{2}+x^{3}-x^{4}

Q1.7

Let f(x,y)=x+yxyf(x,y)=\frac{x+y}{x-y} if xyx \ne y, and 0 if x=yx=y. For which points on the line x=yx=y is f(x,y)f(x,y) continuous?

a)

f is continuous at every point on x=yx=y.

b)

f is continuous only at the origin (0,0).

c)

f is continuous at all points on x=yx=y except when x0x \ne 0.

d)

f is discontinuous everywhere on x=yx=y.

Q1.8

Let f(x,y)=exyf(x,y)=e^{xy}. Which of the following best describes the total derivative of f at a point (a, b)?

a)

The total derivative exists if the partial derivatives exist, regardless of continuity.

b)

The total derivative is given by df=eab(bdx+ady)df=e^{ab}(b dx + a dy) evaluated at (a, b).

c)

f is differentiable only if its partial derivatives are continuous.

d)

The existence of one zero partial derivative implies the total derivative does not exist.

Q1.9

Let A be a 5×75 \times 7 matrix with rank(A)=4rank(A)=4. According to the Rank-Nullity Theorem, what is the dimension (nullity) of the null space?

a)

1

b)

3

c)

14\frac{1}{4}

d)

7

Q1.10

Consider the system {x+y=52x+2y=10\begin{cases}x+y=5\\ 2x+2y=10\end{cases}. Which of the following best describes the solution set of the system?

a)

A unique solution

b)

No solution

c)

Infinitely many solutions

d)

A solution only exists for x=yx=y

Q.2 Solve both questions :

Q2.1

Show that the Gamma function satisfies Γ(n+1)=n!\Gamma(n+1)=n! For positive integers n.

Q2.2

Find the volume of the solid obtained by rotating the curve y=x2y=x^{2} about the x-axis from x=0x=0 to x=ax=a.

Q.3 Solve both questions :

Q3.1

Evaluate the improper integral 0eaxsinbx dx\int_{0}^{\infty}e^{-ax}\sin bx~dx where a&gt;0 and b&gt;0.

Q3.2

Let f(x)=x(x3)2,xRf(x)=x(x-3)^{2}, x\in\mathbb{R}.
i. Show that f is continuous on [0,3] and differentiable on (0,3).
ii. Verify that f(0)=f(3)f(0)=f(3).
iii. Use Rolle's Theorem to show that there exists at least one c in (0,3) such that $ f^{\prime}(c)=0 $. Find the value of c.

Q.4 Solve both questions :

Q4.1

Evaluate the limit limx0tanxxx3\lim_{x\rightarrow0}\frac{\tan x-x}{x^{3}}. Provide a detailed step-by-step application of L'Hôpital's rule.

Q4.2

Consider the function f(x)=x36x2+9x+5f(x)=x^{3}-6x^{2}+9x+5.
1. Find the critical points of f by solving f(x)=0f^{\prime}(x)=0.
2. Determine the nature (local maximum or minimum) of each critical point using the second derivative test.
3. Find the absolute maximum and minimum of f on the closed interval [0, 5].

Q.5 Solve both questions :

Q5.1

Consider the series Σn=1(1)nnn+1\Sigma_{n=1}^{\infty}\frac{(-1)^{n}\sqrt{n}}{n+1}.
(i) Use the Alternating Series Test to show that the series converges.
(ii) Determine whether the series converges absolutely or only conditionally.

Q5.2

Write the Maclaurin series for sinx\sin x up to (and including) the x5x^{5} term. Derive the Maclaurin series for ln(1+x)\ln(1+x) and state its interval of convergence.

Q.6 Solve both questions :

Q6.1

Consider the function f(x)=xf(x)=x, $ 0<x< (that="" [-\pi,\pi]="" (="" $="" )).="" ).<="" \pi="" a="" are="" as="" b_{n}="\frac{2(-1)^{n+1}}{n}" be="" by="" coefficients="" expanded="" extension="" f(x)="" fourier="" given="" is="" is,="" odd="" of="" onto="" p="" series="" show="" sine="" that="" the="" to="" which=""> </x<>

Q6.2

Let $ A=\begin{bmatrix}1&2&3\ 0&1&4\ 5&6&0\end{bmatrix} $.
i. Compute the determinant of A to verify whether A is invertible.
ii. Find the inverse of A.
iii. Determine the rank of A and use the Rank-Nullity theorem to find the nullity of the associated linear transformation T:R3R3T:\mathbb{R}^{3}\rightarrow\mathbb{R}^{3} defined by T(x)=AxT(x)=Ax.

Q.7 Solve both questions :

Q7.1

Let M=[2amp;11amp;2]M=\begin{bmatrix}2&amp;1\\ 1&amp;2\end{bmatrix}.
i. Show that M is symmetric.
ii. Find the eigenvalues and corresponding eigenvectors of M.
iii. Diagonalize M: that is, express it in the form M=PDP1M=PDP^{-1} where D is diagonal.

Q7.2

Find and classify the critical points of the function f(x,y)=x33xyf(x,y)=x^{3}-3xy.

Q.8 Solve both questions :

Q8.1

Find the maximum and minimum values of f(x,y)=x+2yf(x,y)=x+2y subject to the constraint $ g(x,y)=x^{2}-9=0 $.

Q8.2

Consider the series \sum_{n=2}^{\infty}\frac{1}{n(\ln n)^{p}}, p&gt;0.
(i) Show that the function f(x)=1x(lnx)p,x2f(x)=\frac{1}{x(\ln x)^{p}}, x\ge2 is positive, continuous, and decreasing.
(ii) Use the Integral Test to determine for which values of p the series converges.

Q.9 Write short notes on any two of the following:

Q9.1
  1. Gradient, curl and divergence with applications.
  2. Evaluation of definite and improper integrals with applications.
  3. Applications of definite integrals to evaluate surface areas and volumes of revolutions.
  4. System of linear equations with applications.
a)

Gradient, curl and divergence with applications.

b)

Evaluation of definite and improper integrals with applications.

c)

Applications of definite integrals to evaluate surface areas and volumes of revolutions.

d)

System of linear equations with applications.


2022 105102

B.Tech 1st Semester Exam-2022

Time 03 Hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Q.1 Choose the correct answer of the following (any seven Question only):

Q1.1

Lagrange's mean value theorem can be proved for a function f(x) by applying Roll's mean value theorem

a)

φ(x)=f(x)+kx2\varphi(x) = f(x) + kx^2

b)

φ(x)=f(x)kx2\varphi(x) = f(x) - kx^2

c)

φ(x)=f(x)+kx\varphi(x) = f(x) + kx

d)

φ(x)={f(x)}2+kx2\varphi(x) = \{f(x)\}^2 + kx^2

Q1.2

The function $ f(x) = x(x + 3) e^{-\frac{x}{2}} $ satisfy all conditions of Roll's mean value theorem in the interval [-3, 0]. Then the value of c is:

a)

0

b)

1

c)

2

d)

-2

Q1.3

if $ \begin{bmatrix} 4/3 \\ 1 \end{bmatrix} $ is an eigenvector of $ \begin{bmatrix} 3 & 4 \\ 3 & 1 \end{bmatrix} $. What is the associated eigenvalue?

a)

4/3

b)

5

c)

-2

d)

None of the above

Q1.4

if f is continuous on [-2.354, 2.354] then

a)

2.3542.354f(cosx)dx=0\int_{-2.354}^{2.354} f(\cos x) dx = 0

b)

2.3542.354f(cosx)dx=202.354f(cosx)dx\int_{-2.354}^{2.354} f(\cos x) dx = 2 \int_{0}^{2.354} f(\cos x) dx

c)

2.354

d)

none of the above

Q1.5

let $ f(x) = |x|^{\frac{3}{2}}, x \in R $ then

a)

f is uniformly continuous

b)

f is continuous, but not differentiable at x=0x = 0

c)

f is differentiable, and derivative of f is continuous

d)

f is differentiable, but derivative of xx is discontinuous at x=0x = 0

Q1.6

if $ A(2) = 2i - j + 2k, A(3) = 4i - 2j + 3k $, then $ \int_{2}^{3} A \cdot \frac{dA}{dt} dt $ is

a)

5

b)

10

c)

15

d)

20

Q1.7

if $ \nabla \times \vec{F} $. Then it is called.

a)

solenoidal

b)

Rotational

c)

irrotational

d)

None

Q1.8

if $ 3x + 2y + z = 0, x + 4y + z = 0, 2x + y + 4z = 0 $ be a system of equations, then

a)

It is inconsistent

b)

It has only the trivial solution x=0x = 0, y=0y = 0, z=0z = 0

c)

Determinant of the matrix of coefficients is zero

d)

None of these

Q1.9

If f(x) is continuous in the closed interval [a,b] and f(x) exists in (a,b) and f(a) = f(b), then there exist at least one value $ c(a < c < b) $ Such that $ f'(c)=0 $ is called

a)

Taylor's theorem

b)

Mac Laurin's theorem

c)

Rolle's theorem

d)

Lagrange's mean value theorem

Q1.10

The rank of the matrix $ \begin{bmatrix} 1 & 2 & 3 \\ 2 & 4 & 6 \\ 3 & 6 & 9 \end{bmatrix} $ is

a)

3

b)

2

c)

1

d)

none of these

Q.2 Solve both questions :

Q2.1

show that : $ \int_{0}^{\infty} x^2 e^{-x^4} dx \times \int_{\infty}^{\infty} e^{-x^4} dx = \frac{\pi}{8\sqrt{2}} $

Q2.2

Use L' Hospital rule to find the following limits. $ \lim_{x \to 0} \frac{\cos - \ln (1+x) - 1 + xy^x}{\sin^2 x} $

Q.3 Solve both questions :

Q3.1

Test the convergence of $ 1 + \frac{3}{7} x + \frac{3.6}{7.10} x^2 + \frac{3.6.9}{7.10.13} x^3 + \frac{3.6.9.12}{7.10.13.16} x^4 + \ldots $

Q3.2

Examine the convergence of the series of which the general term is $ 2^2 4^2 6^2 \cdots \frac{(2n-2)^2}{3.4.5 \cdots (2n-1)2n} x^{2n} $

Q.4 Solve both questions :

Q4.1

Obtain the fourth-degree Taylor's polynomial approximation to $ f(x) = e^{2x} $ about $ x = 0 $. Find the maximum error when $ 0 \leq x \leq 0.5 $

Q4.2

It is given the Rolle's theorem holds the function $ f(x) = x^3 + bx^2 + cx, 1 \leq x \leq 2 $ at the Point $ x = 4/3 $. Find the value of b and c.

Q.5 Solve both questions :

Q5.1

Evaluate $ \int_{0}^{\infty} \log \left( x + \frac{1}{x} \right) \frac{dx}{1+x^2} $

Q5.2

Discuss the convergence of the sequence whose n-th term is $ a_n = \frac{(-1)^n}{n} + 1 $.

Q.6 Solve both questions :

Q6.1

if $ f(x) = \log (1 + x), x > 0 $ using Maclaurin's theorem, show that for $ 0 < \theta < 1 $, $ \log (1 + x)=x - \frac{x^2}{2} + \frac{x^3}{3(1+\theta x)^3} $. Deduce that $ \log (1+x)=< x - \frac{x^2}{2} + \frac{x^3}{3} $ for $ x> 0 $

Q6.2

Using Taylor's theorem, express the polynomial $ 2x^3 + 7x^2 + x - 6 $ in powers of (x - 1).

Q.7 Solve both questions :

Q7.1

Find the values of a,b,c if A = $ \begin{bmatrix} 0 & 2b & c \\ a & b & -c \\ a & -b & c \end{bmatrix} $ is orthogonal?

Q7.2

Verify Cayley-Hamilton theorem for the matrix A = $ \begin{bmatrix} 1 & 4 \\ 2 & 3 \end{bmatrix} $ and find its inverse. Also express $ A^5 - 4A^4 - 7A^3 + 11A^2 - A - 10I $ as a linear polynomial in A.

Q.8 Solve both questions :

Q8.1

Expand $ \ln x $ in power of $ (x - 1) $ by Taylor's theorem.

Q8.2

By using Beta function evaluate $ \int_{0}^{1} x^5 (1 + x^3)^{10} dx $.

Q.9 Solve both questions :

Q9.1

Find the Fourier series to represent the function defined as $ f(x) = \begin{cases} x + \frac{\pi}{2}, & -\pi < x < 0 \\ \frac{\pi}{2} - x, & 0 < x < \pi \end{cases} $

Q9.2

Evaluate: (i) div F and Curl F, where F= grad $ (x^3 + y^3 + z^3 - 3xyz) $. (ii) If $ F = (x + y + z) i + j - (x + y)k $ show that $ F \cdot \text{Curl} F = 0 $.


2022 V4 105102

B.Tech 1st Semester Exam-2022

Time 03 Hours
Full Marks 70
Instructions:
  • The marks are indicated in the right-hand margin.
  • There are NINE questions in this paper.
  • Attempt FIVE questions in all.
  • Question No. 1 is compulsory.

Q.1 Choose the correct answer of the following (any seven Question only):

Q1.1

Lagrange's mean value theorem can be proved for a function f(x) by applying Roll's mean value theorem

a)

φ(x)=f(x)+kx2\varphi(x) = f(x) + kx^2

b)

φ(x)=f(x)kx2\varphi(x) = f(x) - kx^2

c)

φ(x)=f(x)+kx\varphi(x) = f(x) + kx

d)

φ(x)={f(x)}2+kx2\varphi(x) = \{f(x)\}^2 + kx^2

Q1.2

The function $ f(x) = x(x + 3) e^{-\frac{x}{2}} $ satisfy all conditions of Roll's mean value theorem in the interval [-3, 0]. Then the value of c is:

a)

0

b)

1

c)

2

d)

-2

Q1.3

if $ \begin{bmatrix} 4/3 \\ 1 \end{bmatrix} $ is an eigenvector of $ \begin{bmatrix} 3 & 4 \\ 3 & 1 \end{bmatrix} $. What is the associated eigenvalue?

a)

4/3

b)

5

c)

-2

d)

None of the above

Q1.4

if f is continuous on [-2.354, 2.354] then

a)

2.3542.354f(cosx)dx=0\int_{-2.354}^{2.354} f(\cos x) dx = 0

b)

2.3542.354f(cosx)dx=202.354f(cosx)dx\int_{-2.354}^{2.354} f(\cos x) dx = 2 \int_{0}^{2.354} f(\cos x) dx

c)

2.354

d)

none of the above

Q1.5

let $ f(x) = |x|^{\frac{3}{2}}, x \in R $ then

a)

f is uniformly continuous

b)

f is continuous, but not differentiable at x=0x = 0

c)

f is differentiable, and derivative of f is continuous

d)

f is differentiable, but derivative of xx is discontinuous at x=0x = 0

Q1.6

if $ A(2) = 2i - j + 2k, A(3) = 4i - 2j + 3k $, then $ \int_{2}^{3} A \cdot \frac{dA}{dt} dt $ is

a)

5

b)

10

c)

15

d)

20

Q1.7

if $ \nabla \times \vec{F} $. Then it is called.

a)

solenoidal

b)

Rotational

c)

irrotational

d)

None

Q1.8

if $ 3x + 2y + z = 0, x + 4y + z = 0, 2x + y + 4z = 0 $ be a system of equations, then

a)

It is inconsistent

b)

It has only the trivial solution x=0x = 0, y=0y = 0, z=0z = 0

c)

Determinant of the matrix of coefficients is zero

d)

None of these

Q1.9

If f(x) is continuous in the closed interval [a,b] and f(x) exists in (a,b) and f(a) = f(b), then there exist at least one value $ c(a < c < b) $ Such that $ f'(c)=0 $ is called

a)

Taylor's theorem

b)

Mac Laurin's theorem

c)

Rolle's theorem

d)

Lagrange's mean value theorem

Q1.10

The rank of the matrix $ \begin{bmatrix} 1 & 2 & 3 \\ 2 & 4 & 6 \\ 3 & 6 & 9 \end{bmatrix} $ is

a)

3

b)

2

c)

1

d)

none of these

Q.2 Solve both questions :

Q2.1

show that : $ \int_{0}^{\infty} x^2 e^{-x^4} dx \times \int_{\infty}^{\infty} e^{-x^4} dx = \frac{\pi}{8\sqrt{2}} $

Q2.2

Use L' Hospital rule to find the following limits. $ \lim_{x \to 0} \frac{\cos - \ln (1+x) - 1 + xy^x}{\sin^2 x} $

Q.3 Solve both questions :

Q3.1

Test the convergence of $ 1 + \frac{3}{7} x + \frac{3.6}{7.10} x^2 + \frac{3.6.9}{7.10.13} x^3 + \frac{3.6.9.12}{7.10.13.16} x^4 + \ldots $

Q3.2

Examine the convergence of the series of which the general term is $ 2^2 4^2 6^2 \cdots \frac{(2n-2)^2}{3.4.5 \cdots (2n-1)2n} x^{2n} $

Q.4 Solve both questions :

Q4.1

Obtain the fourth-degree Taylor's polynomial approximation to $ f(x) = e^{2x} $ about $ x = 0 $. Find the maximum error when $ 0 \leq x \leq 0.5 $

Q4.2

It is given the Rolle's theorem holds the function $ f(x) = x^3 + bx^2 + cx, 1 \leq x \leq 2 $ at the Point $ x = 4/3 $. Find the value of b and c.

Q.5 Solve both questions :

Q5.1

Evaluate $ \int_{0}^{\infty} \log \left( x + \frac{1}{x} \right) \frac{dx}{1+x^2} $

Q5.2

Discuss the convergence of the sequence whose n-th term is $ a_n = \frac{(-1)^n}{n} + 1 $.

Q.6 Solve both questions :

Q6.1

if $ f(x) = \log (1 + x), x > 0 $ using Maclaurin's theorem, show that for $ 0 < \theta < 1 $, $ \log (1 + x)=x - \frac{x^2}{2} + \frac{x^3}{3(1+\theta x)^3} $. Deduce that $ \log (1+x)=< x - \frac{x^2}{2} + \frac{x^3}{3} $ for $ x> 0 $

Q6.2

Using Taylor's theorem, express the polynomial $ 2x^3 + 7x^2 + x - 6 $ in powers of (x - 1).

Q.7 Solve both questions :

Q7.1

Find the values of a,b,c if A = $ \begin{bmatrix} 0 & 2b & c \\ a & b & -c \\ a & -b & c \end{bmatrix} $ is orthogonal?

Q7.2

Verify Cayley-Hamilton theorem for the matrix A = $ \begin{bmatrix} 1 & 4 \\ 2 & 3 \end{bmatrix} $ and find its inverse. Also express $ A^5 - 4A^4 - 7A^3 + 11A^2 - A - 10I $ as a linear polynomial in A.

Q.8 Solve both questions :

Q8.1

Expand $ \ln x $ in power of $ (x - 1) $ by Taylor's theorem.

Q8.2

By using Beta function evaluate $ \int_{0}^{1} x^5 (1 + x^3)^{10} dx $.

Q.9 Solve both questions :

Q9.1

Find the Fourier series to represent the function defined as $ f(x) = \begin{cases} x + \frac{\pi}{2}, & -\pi < x < 0 \\ \frac{\pi}{2} - x, & 0 < x < \pi \end{cases} $

Q9.2

Evaluate: (i) div F and Curl F, where F= grad $ (x^3 + y^3 + z^3 - 3xyz) $. (ii) If $ F = (x + y + z) i + j - (x + y)k $ show that $ F \cdot \text{Curl} F = 0 $.


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