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Determine K if f(x)=Ke^(- theta x),0lex ...

Determine K if `f(x)=Ke^(- theta x),0lex < theta,theta > 0`
`=0`,otherwise
is the p.d.f. of r.v. X. Also find `P(X > 1/theta)` and find M if `P(0 < X < m)=1/2`.

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