y=x3−2x2−15x+5y = x^3 - 2x^2 - 15x + 5y=x3−2x2−15x+5
Find dydx\displaystyle \frac{dy}{dx}dxdy
C is the curve with equation y=x3−2x2−15x+5y = x^3 - 2x^2 - 15x + 5y=x3−2x2−15x+5
Work out the range of values of x x\,x for which C has a negative gradient.
Practise Edexcel IGCSE Maths Differentiation with exam-style questions for IGCSE Maths. 5 questions, matched to the Edexcel IGCSE Maths (4MA1) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.