The point K K\,K lies on the curve with equation y=3ex+1ex+1\displaystyle y = \frac{3e^x+1}{e^x+1}y=ex+13ex+1 with xxx-coordinate 0.
Find an equation of the normal to the curve at the point KKK.
375 exam-style questions on AQA A Level Maths 1.10 G: Differentiation, covering 1.10.1 The derivative and second derivative, 1.10.2 Differentiating standard functions, 1.10.3 Applications of differentiation, 1.10.4 Product, quotient and chain rules (A-level only), 1.10.5 Implicit and parametric differentiation (A-level only), and 1.10.6 Constructing differential equations (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.