How do I find the inverse of a function?

To find the inverse of a function you need to rearrange from y= a function in terms of x to x=a function in terms of y and then when you write your answer it's important to set it in the form f^-1(x)=a function in terms of x.To check your answer it's good to keep in mind that the inverse of any function is a reflection in the line y=x so you can draw your functions to check your answers.

NH

Related Maths A Level answers

All answers ▸

Find the integral of 1/(x-5) with respect to x


The function f has domain (-∞, 0) and is defines as f(x) = (x^2 + 2)/(x^2 + 5) (here ^ is used to represent a power). Show that f'(x) < 0. What is the range of f?


How can I find the equation of a line l which passes through the points (5,7) and (3, -1)


Find the equation of the tangent to the curve y = 2 ln(2e - x) at the point on the curve where x = e.