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tmua.me Medium Set E Paper 1 · Q2

Paper 1CalculusFunctions & graphs

A differentiable function ff satisfies

f′(x)=3x2−18x+15f'(x)=3x^2-18x+15

for all real xx.

The curve y=f(x)y=f(x) has two stationary points, AA and BB.

What is the gradient of the straight line ABAB?

A−32-32
B−8-8
C00
D88
E3232

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