Mathematics 9709 · AS & A Level · Integration

Integration — practice question

Define $f(x)$ by $f(x) = \frac{11x + 7}{(2x - 1)(x + 2)^2}$.
(i)[5]

Express $f(x)$ as a sum of partial fractions.

(ii)[5]

Show that $\int_1^2 f(x)\,dx$ is equal to $\frac{1}{4} + \ln\left(\frac{9}{4}\right)$.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: State, or make clear, that $f(x)=\frac{A}{2x-1}+\frac{B}{x+2}+\frac{C}{(x+2)^2}$

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