Answer any one question from Q1 and Q2
1 (a)
Examine the following system of equations for consistency and solve it, if consistent.
4x-2y+6z=8
x+y-3z=-1, 15x-3y+9z=21
4x-2y+6z=8
x+y-3z=-1, 15x-3y+9z=21
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1 (b)
Examine the following vectors for Linear dependence. Find the relation between them, if dependent.
(2, -1, 3, 2), (1, 3, 4, 2) and (3, -5, 2, 2)
(2, -1, 3, 2), (1, 3, 4, 2) and (3, -5, 2, 2)
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1 (c)
If 2 cos ϕ=x+1/x, 2cosψ=y+1/y
prove that, xpyq+1/xpyq=2 cos (pϕ + qψ)
prove that, xpyq+1/xpyq=2 cos (pϕ + qψ)
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2 (a)
Use de Moivre's theorem, to solve the equation
x7+x4+I (x3+1)=0
x7+x4+I (x3+1)=0
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2 (b)
If (1+ai)(1+bi)=p+iq, then prove that,
i) p tan [tan-1 + tan-1b]=q
ii) (1+a2)(1+b2)=p2+q2
i) p tan [tan-1 + tan-1b]=q
ii) (1+a2)(1+b2)=p2+q2
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2 (c)
Reduce the following matrix A to its normal form and hence find its rank, where
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Answer any one question from Q3 and Q4
3 (a)
Test convergence of the series (any one)
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3 (b)
Expand 40+53(x-2)+19(x-2)2+2(x-2)3 in ascending powers of x
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3 (c)
If y=xn log x then, prove that
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4 (a)
Solve any one: ii) Find the values of a and b such that,
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4 (b)
prove that,
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4 (c)
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Solve any two of the following:
5 (a)
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5 (b)
if x=u tan v, y=u sec v prove that
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Answer any one question from Q5 and Q6
5 (c)
Then, find the value of
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Solve any two of the following:
6 (a)
If u=(x2-y2) f(xy) then show that
uxx+uyy=(x4-y4) f''(xy)
uxx+uyy=(x4-y
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6 (b)
Verify Euler's theorem for homogeneous functions
F(x,y,z)=3x2yz+5xy2z+4z4
F(x,y,z)=3x2yz+5xy
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6 (c)
If x=u+v+w, y=uv+uw+vw, z=uvw and F is function of x,y,z then prove that,
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Answer any one question from Q7 and Q8
7 (a)
If x=v2+w2, y=w2+u2, z=u2+v2 Find
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7 (b)
Examine for functional dependence for u=x+y+z, v=x2+y2+z3, w=x3+y3+z3-3xyz.
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7 (c)
Find the extreme values of f(x,y)=x3+y-3axy, a>0
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8 (a)
If u2+xv2=x+y and v2+yu2=x-y find
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8 (b)
The resistance R of a circuit was calculated using the formula I=E/R. If there is an error of 0.1 Amp in reading I and 0.5 Volts in E, find the corresponding percentage error in R when I=15 Amp and E=100 Volts
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8 (c)
Divide 24 into three parts such that, the continued product of the first, square of the second and cube of the third may be maximum. Use Lagrange's method.
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