LetXbe a discrete random variable with pmf (probability mass function)

?pX(x)=c(3/4)^x,x=1,2,3,.

1. Determine the constantcso thatpX(x) is a valid distribution function.
2. FindP(2
3. Write down the name and specify the corresponding parameter(s) of the distribution ofX.
4. FindE[X(X?1)].

Let X be a discrete random variable with pmf (probability mass function) pxtr) : (3 (Z) ,2? : 132131 " - (a) Determine the constant c so that px(m) is a valid distribution function. (b) Find P(2