Question

find the points on the surface y^2=9+xz that are closest to the origin

Answer 1

how do i work out the moment generating function for a binomial distribution

Answer 2

i reach up to here and then dont know where to go \[\sum_{y=0}^{n} \left(\begin{matrix}n \\ y\end{matrix}\right)(pe^t)^y(1-p)^n-p\]

Answer 3

the last parth is suposed to be (1-p)^(n-y)