Prove, from first principles, that the derivative of kx3 kx^3\,kx3 is 3kx23kx^23kx2, where k k\,k is a constant.
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Markscheme
1.10.1 The derivative and second derivative Questions
8 exam-style questions on AQA A Level Maths 1.10.1 The derivative and second derivative. Each one has a worked solution and a mark scheme showing where the marks go.