Mathematics 9709 · AS & A Level · Numerical solution of equations

Numerical solution of equations — practice question

The terms generated by the iterative rule $x_{n+1} = \frac{2x_n^2 + x_n + 9}{(x_n + 1)^2}$, beginning with $x_1 = 2$, settle to $\alpha$.
(i)[3]

Determine $\alpha$ correct to $2$ decimal places, and give the outcome of each iteration correct to $4$ decimal places.

(ii)[3]

Find the exact value of $\alpha$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Apply iteration correctly on at least one occasion

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