請問以下兩題:
(1) Z = X+Y, r.v X~exp(1) and r.v Z~exp(1) , X and Y are independent
then what's the pdf of Y ?
(2) if X ~ F(x) = (1-exp(-2x))u(x), F(x) is the cdf of X,
let Y = (X -1)u(x-1), u(x) is step function
what's the pdf of Y ?
謝謝
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