It is given that
f(x)=4x3+3xf(x) = 4x^3 + 3xf(x)=4x3+3x
Use differentiation from first principles to prove that
f′(x)=12x2+3f'(x) = 12x^2 + 3f′(x)=12x2+3
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Markscheme
1.9.2 Gradient as limit of chord gradient Questions
8 exam-style questions on OCR (MEI) A Level Maths 1.9.2 Gradient as limit of chord gradient. Each one has a worked solution and a mark scheme showing where the marks go.