DIFFERRENTIATIon

I f(x) nd g(x) have noo derivative at x=a,then f(x)+g(x) may have a derivative at x=a.

plz explain dis........

1 Answers

let f(x) = {x} fractional part of x

this is not differentiable at x=0

also take

g(x) = [x] greates integer..

This is also not diff

but f(x)+g(x)=x is differentiable at x=0

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