Product rule for derivatives
From specialfunctionswiki
The product rule for differentiation is the formula $$\dfrac{\mathrm{d}}{\mathrm{d}x}[f(x)g(x)] = f'(x)g(x)+f(x)g'(x).$$
The product rule for differentiation is the formula $$\dfrac{\mathrm{d}}{\mathrm{d}x}[f(x)g(x)] = f'(x)g(x)+f(x)g'(x).$$
