Q.

Let f(x)=01|tx|dt then

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a

 f(x) is differentiable for all xR

b

f(x) is not differentiable at x = 0,1

c

f(x) is a constant function

d

f(x) is continuous for all xR

answer is B, C.

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Detailed Solution

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f(x)=01(tx)dt x00x(xt)dt+x1(tx)dt 0<x<101(xt)dt x1 =12x x012x+x2 0<x<1x12 x1 Which is continuous and differentiable for all x.

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