Solve the equation x−12=k\displaystyle x^{\frac{-1}{2}} = kx2−1=k, where k k\,k is a positive constant, giving your answer in terms of kkk.
233 exam-style questions on Edexcel A Level Maths Algebraic Expressions, covering 1.1 Index Laws, 1.2 Expanding Brackets, 1.3 Factorising, 1.4 Negative and Fractional Indices, and 1.5 Surds. Each one has a worked solution and a mark scheme showing where the marks go.