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The set of points where f(x)=x/(1+|x|) i...

The set of points where `f(x)=x/(1+|x|)` is differentiable is

A

` (-infty,0 ) uu(0,infty ) `

B

` (-infty ,-1) uu(-1,infty ) `

C

` (0,infty ) `

D

` (-infty ,infty ) `

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The correct Answer is:
D
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  2. If f(x) = {{:( 1-2x +3x^(2) -4x^(3) +......infty,"for" xne 1),( 1,"f...

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  18. If lim( xto 2 ) (f(x) -f(2))/( x-2) exist ,then

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  19. If f is derivable at x =a,then lim(xto a )( (xf(a) -af( x))/(x-a) )

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