~

-.A...,

- ~-- - .-- -- - -e- . --

Paper ID [AMI02]

":Y

(Please fill this Paper

B.Tech.

ENGINEERING Time: 03 Hours

(Sem.

ID in OMR Sheet)

- 1st /2nd)

MATHEMATICS

-II (AM-I02) Maximum Marks: 60

Instruction to Candidates: 1). Section - A is Compulsory. 2)

Attempt any Five questions from Section-B & C

3)

Select at least Two questions from St?ction-B& C. Section - A

Ql)

(Marks: 2 each)

a) Define linear independence of vectors. b.) Define IJermitian matrix with an example. c) Check the equation (3X2+ 2eY)dx +(2xeY + 3y2)dy

=0 for exactness.

d) Find the particular integral of the equation 4 yO- 4 y' + y e) Find the complementary function of the equation

yH

= ex/2

+ 4y' + 3y = xsin 2x.

"

f)

Find v'(t), given that vet) = (cost + t2)(tf +

g) Evaluate

J+ 2k)

f x2yds, where Cis the curve definedby x =3

c

cost,y = 3 sint

'

for the interval 0 ~ t ~ n12. h) Two dice are tossed once. Find the probability of getting an eve~ number on the first dice. i)

Check the correctness of the staten1ent, "Mean of a binomial distribution is 3 and variance is 5".

j)

Explain Type I and Type II errors.

Section - B 1 0 0 Q2)

If A=

10 [ 010

..,

1,

(Marks: 8 each>---

,

then show that An=An~2+A2-I,for

n~3.

Herlt;~

]

findA5O. Q3)

Obtain the general and as well as singular solution of the non-linear equation Y =xy' + (y'f.

Q4)

Solve the system of equations (2D - 4)Yl + (3D + 5)Y2 = 3t+ 2, (D - 2)Yl + (D + I)Y2 = t

Q5)

A starched elastic horizontal string has one end fixed and a particle of mass m is attached to the other. Find the equation of the motion of the partiCle given .t~",tl is the natural length of the string and e is its elongation due to weight mg. . Also find the displacement s of particle when initially s =0, v =O. .

Section

-C

(Marks: 8 each)

Q6) (a) Find the normal vector and the equation of the tangent plane to the surface z =~x2 + y2 at the point (3, 4, 5). (b) Find the work done by the force

over the circular path X2+ y \

'ft'

= - xyi

+ y2

=4, z = 0 from

J + zk

in moving a particle

(2, 0, 0) to (0, 2, 0).

.

.

Q7) Verify Stokes theorem for the vector field v

=(3x -

J

y)i - 2 yz2 - 2y2 zk ,

where S is the surface of the sphere x2 + y2 + Z2 = 16, z

> O.

-

Q8)

Ina distribution which is exactly normal, 12% of the items are under 30 and, 85% are under 60. Find the mean and standard deviation of the distribution. (Area under normal curve for 0 ~ z ~ 0.38 is 1.1750 and for 0 ~z.~ 0.35 is 1.0365)

Q9)

Annual rain~all at a certain place is normally distributed with mean 45 cm. The rainfall for the last five years are 48cm, 42 cm, 40 cm, 44 cm and 43 cm. Can it be concluded that the average rainfall during the last five years is less' than the normal rainfall? .

.(Given

that to.05for v

=4 is 2.776) DDD

J-9546

-2-

GNDEC B.Tech AM 1st Year Dec 2007 Engineering Mathematics-II.pdf ...

Q4) Solve the system of equations. (2D - 4)Yl + (3D + ... Q9) Annual rain~all at a certain place is normally distributed with mean 45 cm. The rainfall for the last five ...

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