Suppose that X is a random variable whose density is f(x) = 1 / [2*(1 + |x|)^2] , (- inf < x< inf)
a) Draw the graph of f(x)
b) Find P(-1 < X < 2)
c) Find P(|X| > 1)
d) Is E(X) defined?
So I don't know about the other parts, but for part b is it just something like the integral from -1 to 2 of f(x)? Thanks for any help!!