a****n
发帖数: 121 | 1 we have a rv x which is distributed exponentially P(5
(10
I know we should solve (e^(-5t)) - e^(-10t) = .25 to get t, then calculate
(e^(-10t)) - e^(-20t)
but my calculation is poor. can anyone help? | a****n
发帖数: 121 | | C********n
发帖数: 6682 | 3 e^(-5t) = x
x-x^2= 1/4
x= 1/2
e^(-10t) -e^(-20t) = x^2 -x^4 = 1/4 - 1/16 = 3/16 ?
P
calculate
【在 a****n 的大作中提到】
: we have a rv x which is distributed exponentially P(5: (10: I know we should solve (e^(-5t)) - e^(-10t) = .25 to get t, then calculate
: (e^(-10t)) - e^(-20t)
: but my calculation is poor. can anyone help?
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