The point P P\,P lies on the curve with equation y=ex+1ex+3\displaystyle y = \frac{e^x+1}{e^x+3}y=ex+3ex+1 with x x\,x coordinate 0.
Find an equation to the normal to the curve at the point PPP.
51 exam-style questions on Edexcel A Level Maths 9.3 The Chain Rule. Each one has a worked solution and a mark scheme showing where the marks go.