, Generalizing the Product Rule The Derivative Product Rule gives the formula d du + du dx (uv) = dx dx U for the derivative of the product uv of two differentiable functions of x. a. What is the analogous formula for the derivative of the prod- uct uvw of three differentiable functions of x? b. What is the formula for the derivative of the product u Uzuzu4 of four differentiable functions of x? c. What is the formula for the derivative of a product u uzu . . . Un of a finite number n of differentiable functions of x