Higher June 2025 Paper 2 Q9
9 \(3x^{-1}(4x - x^3) = a + bx^n\) for all the values of \(x\) that are not zero.
Find the value of \(a\), the value of \(b\) and the value of \(n\). (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(12, -3, 2\) | B2 | all correct |
| (B1 | for one or two correct) |
Additional guidance
\(12 - 3x^2\) seen in working space gets B2 unless contradicted
May be seen in an expression of the correct form, eg \(a + bx^n\)