The Joint Probability Density Function of X and Y is
f(x,y) = c(y^2 - 64x^2)e^-y, -y/8<= x <= y/8, 0<y<infinity
So the integral would look something like this?
Find c and the expected Value of X.
But I don't know how where to go from here or how to get the expected value
C is supposed to be 1 and E[X] should be 0.