Starting with x0=0x_0 = 0x0=0, use the iteration formula xn+1=2xn2+4\displaystyle x_{n+1} = \frac{2}{x_n^2 + 4}xn+1=xn2+42 three times to find an estimate for the solution to x3+4x=2x^3 + 4x = 2x3+4x=2
124 exam-style questions on OCR GCSE Maths Iteration. Each one has a worked solution and a mark scheme showing where the marks go.