Higher November 2019 Paper 3 Q17
17 \(\mathrm{f}(x) = 3x^2 - 4x + 8 \quad\) for all values of \(x\)
Jenny says,
“f(10) must equal \(2 \times\) f(5), because 10 is \(2 \times 5\)”
Is Jenny correct?
Show working to support your answer. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| (f(10) =) \(3 \times 10^2 - 4 \times 10 + 8\) or (f(10) =) \(300 - 40 + 8\) or (f(10) =) 268 or (f(5) =) \(3 \times 5^2 - 4 \times 5 + 8\) or (f(5) =) \(75 - 20 + 8\) or (f(5) =) 63 or (2f(5) =) \(2 \times 63\) or 126 | M1 | |
| 268 and 126 and No | A1 |