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Posted Date: 13 Nov 2010      Posted By:: Abin Lesly    Member Level: Gold  Points: 5 (Rs. 1)

2009 Kerala University General Combined First and Second Semester B.Tech. Degree Examination, May 2009 (2008 Scheme) - MATHEMATICS I Question paper



Course: B.Tech   University/board: Kerala University





Combined First and Second Semester B.Tech. Degree Examination, May 2009
(2008 Scheme)

08 -101 : ENGINEERING MATHEMATICS – I

PART A

Answer all questions. Each question carries 4 marks.

1. Find the nth derivative of x2 log 3x.

2. Find the radius of curvature at any point of the cycloid x = a( ? + sin ? ),
y = a(1 – cos ? ).

3.Prove that log(1 + ex) = log2 +2x+8x2–192x4+ ...............

4.Find the value of n if rn r is solenoidal, where r = k ˆ z j ˆ y i ˆ x + + and r = | r | .

5.If F = f ? , find f when F = 2xyz3i ˆ + x2z3 j ˆ + 3x2yz2k ˆ and f (1, –2, 2) = 4.

6. Find the particular integral of (D2 + 6D + 9)y = e–2x x3.

7.If ? is an eigen value of a matrix A, then show that 1/? is the eigen value of A–1.

8.State Cayley-Hamilton theorem and use it to find the inverse of the matrix 1 4 .
2 3

PART – B

Answer two questions from each Module. Each question carries 10 marks.

Module – I

9. Show that the evolute of the parabola x2 = 4ay is 4(y – 2a)3 = 27ax2.

10.If k ˆ z j ˆ y i ˆ r = x + + and | r |= r, show that
a) ?rn = nrn–2 r
b) ?2rn = n(n + 1) rn–2.

Module – II

11. Solve (D2 – 4D + 4)y = 8(e2x + sin 2x).

12.
a)Find the inverse Laplace transform of log(S+1)/(S-1).
b)Apply convolution theorem to evaluate L–1(s/(s2+a2)2).

Module – III

13. Test for consistency and solve :
x + 2y + z = 3
2x + 3y + 2z = 5
3x – 5y + 5z = 2
3x + 9y – z = 4.

14.Reduce the quadratic form 6x2 + 3y2 + 3z2 – 2yz + 4zx – 4xy to canonical form
by an orthogonal transformation. Find the matrix of transformation.

END






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