Clearly is suff for theta, next prove it is complete.
Let . Find the complete sufficient statistic for theta.
From what I understand, I have write the PDF in the "form" of the Regulat Exponential Class/Family which has the PDF of
so I know , S(x) = 0 and
I don't understand my textbook's explaination of how to find the complete sufficient statistic, would someone please explain the next step I have to take?