[問題] 想請問一題機率
Let X and Y be identical distribution independent random variable
such that the moment generating function of X+Y is
M(t)=0.09e^(-2t)+0.24e^(-t)+0.34+0.24e^t+0.09e^(2t), 負無限大<t<無限大
Calculate P[X<=0]
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已經算出
Mx(t)=0.3e^t+0.4+0.3e^(-t)
不知道怎變成算機率
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