The operator of momentum (layman question)

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    Momentum Operator
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I found two "forms" of it:

p=\frac{\hbar}{i}\frac{d}{dx}

p=-i\hbar\frac{d}{dx}

how could they be the same??
 
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Multiply the right hand side of the first equation with i/i.

Zz.
 
oh...yes thanks a lot
 
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