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let & the take into consideration a enponentially distributed random varicable with f(x) - Xemp (-12) u (x) for some real and

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아 호(+) - E(etux) - T.ox Se) ax [wbo] iorf) dz [ bay daefinition ] dx. Li u(x) = x70]. x(x- iw) -(^-cs) where, d>iw and ¿?= -1

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