# Past Papers’ Solutions | Cambridge International Examinations (CIE) | AS & A level | Mathematics 9709 | Pure Mathematics 2 (P2-9709/02) | Year 2011 | Oct-Nov | (P2-9709/22) | Q#4

Question Find the exact value of the positive constant k for which Solution We are given that; Rule for integration of , or ; Therefore; Let ; Therefore; Taking logarithm of both sides; Power Rule; Since ;