R07

SET-1

Code No:43063

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

2x − 3y + 7z = 5 3 x + y − 3 z = 13 5 x − 2 y + 4 z = 18 And hence solve them.

or ld

⎛2 1 2 1 ⎞ ⎜ ⎟ 4 3 3 −3 ⎟ A =⎜ by reducing it to normal form ⎜ 2 2 −1 1 ⎟ ⎜ ⎟ ⎝ 6 −6 6 12 ⎠ b) Test for consistency of the equation

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II.B.TECH - I SEMESTER REGULAR EXAMINATIONS NOVEMBER, 2009 MATHEMATICS-II (Common to CE, CHEM, MMT, AE, BT) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --1. a) Find the rank of the matrix.

uW

2. Verify Ceyley-Hamilton theorem for the matrix ⎛ 2 −1 1 ⎞ ⎜ ⎟ ⎜ 1 2 −1⎟ and find its inverse. ⎜ 1 −1 2 ⎟ ⎝ ⎠

[8+8]

[16]

3. a) Find a, b, c, so that the matrix.

nt

⎛ 0 2b c ⎞ ⎜ ⎟ A= ⎜ a b −c ⎟ is orthogonal. ⎜ a −b c ⎟ ⎝ ⎠

Aj

b) Find the nature, index and signature of the quadratic form 2 x1 x2 + 2 x1 x3 + 2 x2 x3 .

4. Develop Fourier series for the function f(x) = x + x 2in − π < x < π . Hence deduce that 2 1 1 1 + 2 + 2 +………….. ∞ = π . 2 6 1 2 3

[8+8]

[16]

SET-1

R07

6. Solve by the method of separation of variable the PDES. a) μ xx = μ y + 2 μ

μ x = 4 μ y and μ (0, y ) = 8e−3 y

7. a) Find the Fourier transform of

[8+8]

⎪⎧ x if x ≤ a f ( x) = ⎨ ⎪⎩0 if x > a

or ld

b)

⎧cos x if 0 < x < a b) Find the sin transform of f(x) = ⎨ ⎩0 if x ≥ a 8. a) State and prove Damping rule b) Find z {1}

uW

z ⎧ ⎫ c) Find z −1 ⎨ 2 ⎬ ⎩ z + 7 z + 10 ⎭

nt

*****

Aj

.in

⎛ y⎞ 5. a) Eliminate the arbitrary function f from Z = f ⎜ ⎟ and form a, P, D , E . ⎝x⎠ b) Find the complete integral yzp +zxq = xy [5+5+6] c) Find the complete integral Z= p 2 − q 2

[8+8]

[5+5+6]

R07

SET-2

Code No:43063

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

or ld

.in

II.B.TECH - I SEMESTER REGULAR EXAMINATIONS NOVEMBER, 2009 MATHEMATICS-II (Common to CE, CHEM, MMT, AE, BT) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks --⎡ 3 2 −1⎤ ⎢5 1 0 ⎥ ⎥ by reducing it to normal form. 1. a) Find the rank of A = ⎢ ⎢1 3 2 ⎥ ⎢ ⎥ ⎣ 4 −2 1 ⎦ b) Test for consistency of the equation [8+8] x + 2 y = 3 , y − z = 2 , x + y + z = 1 and hence solve them if possible.

⎛ 1 2 −2 ⎞ ⎜ ⎟ 2. Verify Cayley Hamilton theorem for A = ⎜ 2 5 −4 ⎟ and hence find A−1 . [16] ⎜ 3 7 −5 ⎟ ⎝ ⎠

uW

3. a) Prove that the Eigen values of a Hermitian matrix are all real . b) Reduce the quadratic form 2 x 2 + 2 y 2 + 3z 2 + 2 xy − 4 yz − 4 zx to canonical form. the rank index and signature. [8+8]

nt

4. a) Obtain the Fourier series to represent 1 2 f ( x ) = (π − x ) in 0 < x < 2π 4 b) Develop a Fourier series for the function π f ( x ) = x in 0 < x < 2 π = π − x in < x<π 2

[8+8]

5. a) Obtain the partial differential equation form z = f ( sin x + cos y )

Aj

b) Solve the PDE for xp − yq = y 2 − x 2

c) Solve the PDE for

p (1 + q ) = qz

[6+5+5]

6. a) Solve μ xx − μ y = 0 by separation of variables b) Solve 2 xz x − 3 yz y = 0 by separation of variables

[8+8]

Find

SET-2

R07 7. a) Find the Fourier cosine and sin transform of

8. a) Find i) z {a n }

2

is self reciprocal with respect to Fourier transform. ii )

⎧1⎫ Z⎨ ⎬ ⎩ n !⎭

b) If Z ( μn ) = μ ( z ) prove that

⎛z⎞ z ( a n μn ) = μ ⎜ ⎟ . ⎝a⎠

nt

uW

******

Aj

[8+8]

[8+8]

or ld

− x2

b) Prove that e

.in

⎧= cos x if 0 < x < a f ( x) = ⎨ ⎩0 if x ≥ a

R07

SET-3

Code No:43063

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

1 0 1 1

2 −2 ⎞ ⎟ 2 6⎟ by reducing it to normal form 3 1⎟ ⎟ 4 4⎠

or ld

⎛0 ⎜ 4 1. a) Find the rank of the matrix A= ⎜ ⎜2 ⎜ ⎝4

.in

II.B.TECH - I SEMESTER REGULAR EXAMINATIONS NOVEMBER, 2009 MATHEMATICS-II (Common to CE, CHEM, MMT, AE, BT) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

b) Test for consistency and solve the following equation x+ y+z =3 x + 2 y + 3z = 4 x + 4 y + 9z = 6

[8+8]

uW

⎛1 2 4⎞ ⎜ ⎟ 2. Verify Cayley- Hamilton theorem for the matrix A = ⎜ −1 0 3 ⎟ and hence find ⎜ ⎟ ⎝ 3 1 −2 ⎠ and A4 . [16]

nt

⎛1 2 2 ⎞ 1⎜ ⎟ 3. a) Prove that the matrix A= ⎜ 2 1 −2 ⎟ is orthogonal 3⎜ ⎟ ⎝ 2 −2 1 ⎠ b) Find the nature, index and signature of x12 + 2 x2 2 + 3 x2 2 + 3 x32 + 2 x2 x3 − 2 x3 x1 + 2 x1 x2

Aj

4. a) Find Fourier series for 1 − cos x for −π ≤ x ≤ π b) Find the half-range cosine series for f ( x ) = x in 0 < x < T .

A−1

[8+8]

[8+8]

5. a) Form the partial differential equation by eliminating the ability function of from the relation ⎛1 ⎞ z = y 2 + 2 f ⎜ + log y ⎟ ⎝x ⎠ b) Solve PDE where ( x + y ) zp + ( x − y ) zq = x 2 + y 2 . [8+8]

SET-3

R07

6. Solve the following partial differential equation by the method of separation of variables. a) 4μ x + μ y = 3μ and μ ( 0, y ) = e−5 y b) Z xx − 2 z x + z y = 0

{

}

8. a) Find i) z ( −a n )

ii) z {na n }

b) If z ( μn ) = μ ( z ) prove that z ( a − n μ n ) = μ ( az )

nt

uW

*****

Aj

[8+8]

or ld

7. a) Find the Fourier transform of ⎧⎪a 2 − x 2 if x < a F(x) = ⎨ if x ≥ a ⎪⎩0 b) Find the Fourier transformer of e-ax sin ax.

.in

[8+8]

[8+8]

R07

SET-4

Code No:43063

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

.in

II.B.TECH - I SEMESTER REGULAR EXAMINATIONS NOVEMBER, 2009 MATHEMATICS-II (Common to CE, CHEM, MMT, AE, BT) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks ---

b) Test for the consistency of

or ld

⎛1 4 9 6 ⎞ ⎜ ⎟ 1. a) Find the rank of the matrix A = ⎜1 2 3 4 ⎟ by reducing it to normal form. ⎜1 1 1 3 ⎟ ⎝ ⎠ 3x + 3 y + 2 z = 1 x + 2y = 4 10 y + 3 z = −2

and hence solve them.

[8+8]

2x − 3y − z = 5

uW

⎛2 2 1⎞ ⎟ ⎜ 2. Find the Eigen value and Eigen vectors for the matrix A = ⎜ 1 3 1 ⎟ . Also Verify Cayley ⎜1 2 2⎟ ⎝ ⎠ –Hamilton theorem for the matrix A. [16]

nt

3. a) Prove that the inverse of an orthogonal matrix is orthogonal and its transpose is also orthogonal . b) Reduce the quadratic form 2 x1 x2 + 2 x2 x3 + 2 x3 x1 into canonical form. Classify the quadratic form. [8+8] 4. a) Find the Fourier series to represent f ( x ) = eax in − π < x < π

Aj

⎛πx ⎞ b) Develop sin ⎜ ⎟ in half range cosine series in 0 < x < k . ⎝ k ⎠

[8+8]

5. a) Form the partial differential equation by eliminating the arbitrary constants a and b from z= ax+by+ab b) Solve the partial differential equation p x + q y = z c) Solve the P.D.E. for z = px + qy − 2 pq .

[5+5+6]

b) μ = 3 sin

πx l

when t = 0 for all x in 0< x< l

7. a) prove that the Fourier transform is linear b) Find the Fourier cosine transform of 2e −3 x + 3e −2 x .

b) Using the z – transform solve μn + 2 + 4 ( μn+1 ) + 3μn = 3n given, That μ0 = 0 and μ1 =1 .

uW nt

[8+8]

[8+8]

*****

Aj

[8+8]

or ld

8. a) Find i) z {a n cos θ } ii) z {a n sin θ }

SET-4

R07

.in

∂t ∂2μ = c 2 2 given that 6. Solve ∂u ∂x a) μ = 0 when x = 0 when x = 0 and x = l for all t.

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD · II.B.TECH - I SEMESTER REGULAR EXAMINATIONS NOVEMBER, 2009.

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