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use logarithms to prove that $y = kx$ and determine $k$ correct to 3 significant figures.
Mathematics 9709 · AS & A Level · Logarithmic and exponential functions
Logarithmic and exponential functions — practice question
Since $2^y = 9^{3x}$,
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Take logarithms of both sides and use the power law at least once” …
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