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I was given this problem: Let the state $f(x)=e^{-|x|}$ and an operator $P=-i\frac{d}{dx}$.

(a) What is the probability that a measure of P results in the interval $[0,1]$

(b) What is the Fourier Transform of $f(x)$.

Question: Why is (a) asked before (b), wouldn't we need to use the result from (b) to compute (a)?

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    If it's quantum mechanics, shouldn't it be $f(x)=e^{-\color{red}{\bf i}|x|}$?2012-07-19

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