The chain rule differentiates a composition by multiplying the outer derivative (evaluated at the inner function) by the inner derivative. For (ax+b)^n that means bring down n, keep the inside, reduce the power, then multiply by a.

Steps

1. Recognize the outer power and the inner linear expression g(x) = ax + b.
2. Apply n(ax+b)^{n−1}, then multiply by g'(x) = a.
3. Simplify coefficients.