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maths_mocktest1_12

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A. 1

B. 2

C. 3

D. 4

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f(x)= x.g(x)
find f'(x) which is g(x) + x*g'(x)

d/dx {integral 'a' to 'b' Z(x)dx}= Z(a)* d/dx(a)- Z(b)*d/dx(b)
where a and b are upper and lower limit respectively..

g'(x) is nothing but f(x^2)* d/dx(x^2)- f(1)*d/dx(1)..
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I'm getting $2 \sqrt{5}$ . What's the correct answer?

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