Times x to the, instead of n plus 1, we subtract 1 from the exponent. This is just the power rule. So n plus 1 minus 1 is going to be n. And then we can't forget that we have, we were dividing by this n plus 1. So we have divided by n plus 1. And then we have plus c, the derivative of a constant with respect to x. A constant does not change as x changes. So it is just going to be 0.