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## Homework Statement

Given the operators [itex]\hat{x}=x\cdot[/itex] and [itex]\hat{p}=-i\hbar \frac{d}{dx}[/itex], prove that:

[itex][\hat{x}, g(\hat{p})]=i\hbar \frac{dg}{d\hat p}[/itex]

## Homework Equations

None.

## The Attempt at a Solution

I have very little idea on how to begin this problem, but I don't want a solution, I simply want a hint in the right direction.

Thanks, mates.

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