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

Logarithmic and exponential functions — practice question

(main)[4]

Solve $5^{x+3} = 7^{x-1}$ by using logarithms, and give the result 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: “Take logarithms and apply the power law on two occasions” …

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