hey,

say I know that the following is true:

$\displaystyle E(X)=k$

(where E(.) is the expected value, X is a positive random variable and k is some positive and final number)

what can I say about $\displaystyle E(log(X))$ ?

Can I say it is also final, for instance?

I can maybe even assume k>1 , if it helps (but I cannot assume that on X, which I guess could've helped more in this case)

thank you