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

Logarithmic and exponential functions — practice question

(main)[3]

Solve the equation $|4 - 2^x| = 10$, and give your answer correct to 3 significant figures.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “State or show $4-2^x=-10$ and $10$” …

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