# Real Analysis : Differentiability

Prove that if f and g are differentiable functions on an interval A and satisfy f'(x)=g'(x) for all x belong to A, then f(x)=g(x)+k for some constant k belong to R.

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#### Solution Preview

Proof:

We know if a function h(x) is differentiable on an interval A and h'(x)=0, then h(x) is a ...

#### Solution Summary

Differentiability is investigated and the details are discussed in the solution of how you arrive at the answer.

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