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Euclid R2Drew2 Edition Paper 1 · Q4

Paper 1Functions & graphs

The function ff is defined by

f(x)=x2−6x+7.f(x)=x^2-6x+7.

Distinct real numbers aa and bb satisfy

f(a)=f(b)andf(a+1)=f(b−2).f(a)=f(b)\qquad\text{and}\qquad f(a+1)=f(b-2).

What is abab?

A94\frac94
B92\frac92
C66
D274\frac{27}{4}
E99
F1212

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