The Product Rule Ref Sheet Formula dydx=𝑢𝑑𝑣𝑑𝑥+𝑣𝑑𝑢𝑑𝑥 ddx[ℎ(𝑥)]=𝑓(𝑥)𝑔′(𝑥)+𝑔(𝑥)𝑓′(𝑥)dydx=𝑣𝑢′+𝑢𝑣′Ifℎ(𝑥)=𝑓(𝑥)𝑔(𝑥)→ℎ′(𝑥)=𝑓′(𝑥)𝑔(𝑥)+𝑓(𝑥)𝑔′(𝑥)