## Question

###### Rework Exercise 32 by using Theorem 2 to determine the joint probability density of $Y_{1}=X_{1}+X_{2}$ and $Y_{2}=$ $X_{1}-X_{2}$ and then finding the marginal density of $Y_{1}$.

Rework Exercise 32 by using Theorem 2 to determine the joint probability density of $Y_{1}=X_{1}+X_{2}$ and $Y_{2}=$ $X_{1}-X_{2}$ and then finding the marginal density of $Y_{1}$.

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