Question: We come back to Section 2.2. Show that the function fS(x) = ex/2 ex for x 0 and = 0 otherwise is a probability

We come back to Section 2.2. Show that the function fS(x) = e−x/2 −e−x for x ≥ 0 and = 0 otherwise is a probability density; that is, it is non-negative and the total integral is one.

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