Mathematics 9709 · AS & A Level · Algebra

Algebra — practice question

(a)[4]

Solve for $x$ in the inequality $|3x - 4| \leq |2x + 5|$.

(b)[3]

Hence determine the greatest integer $N$ for which the inequality $|3 \times 7^{0.01N} - 4| \leq |2 \times 7^{0.01N} + 5|$ is true.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: Solve $3x-4=2x+5$ to get $x=9$.

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