How to gain an inverse function
Set f(x) = y. Then rearrange your equation to find x on it's own as some function of y. If you have a x term on both the top and bottom of a fraction then you will have to multiply the whole equation through by the denominator. Times out any brackets and collect all x terms on one side of the equation with any other terms on the other side. To make it neater you would then replace all the y's with x's to make the inverse of f(x).
WS
Related Maths A Level answers
All answers ▸Prove that f(x) the inverse function of g(x) where f(x)= - 3x–6 and g(x)= - x/3–2
Find the Co-ordinates and nature of all stationary points on the curve y=x^3 - 27x, and attempt to sketch the curve
What is the chain rule?
Integrate the function f(x) = ax^2 + bx + c over the interval [0,1], where a, b and c are constants.