# How do you solve for xF X?

## How do you solve for xF X?

int(xf(x)) dx xF(x) – int(F(x)) dx. We still have that integral hanging out on the right side. F(x) is just a placeholder for the antiderivative of f(x), so let’s call the antiderivative of F(x) F*(x). That gives us our final answer of: xF(x) – F*(x)