Mathematics 9709 · AS & A Level · Logarithmic and exponential functions

Logarithmic and exponential functions — practice question

(main)[4]

Solve the equation $\frac{2^x + 1}{2^x - 1} = 5$, and give your answer correct to $3$ significant figures.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: Rearrange to find $2^x$ and arrive at $2^x=\frac{6}{4}$ or an equivalent expression

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI