O-LevelMathematicsAlgebra and graphs4024/11 · Oct/Nov 2015 · Q173 Marks
f(x) = 5 + x². Find t given that f(3 - t) = 9.
- (a)Find t given that f(3 - t) = 9.[3]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.
- [3] 1 or 5 WWW
- [3] Either M1 for 5 + (3-t)² = 9 and M1 for t² – 6t + 5 = 0;
- [3] or M1 for (3-t)² = 4 and M1 for 3 − t = ±2
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