# Proof of Differentiability

Let f(x) = { x^2 if x is rational

{ 0 if x is irrational

Show that f is differentiable at x=0 but not at any other point.

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https://brainmass.com/math/discrete-math/proof-differentiability-48363

#### Solution Summary

Differentiability of a function is proven. The solution is detailed and well presented.

$2.49