How do you know what to do first when solving composite function?

So when you're solving a composite function you carry out the function closest to the 'x' first. It is useful to think of a composite function as the function of a function. Let me demonstrate with an example:E.g. f(x)=10x+7 g(x)=3xfind: fg(x)fg(x) could also be written as f(g(x)) so it is the 'f' of g(x)In order to solve this you need to put g(x) into f(x):fg(x) = 10(3x) + 7 = 30x + 7

Answered by Molly F. Maths tutor

2296 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How would I simplify (3x^2 − 8x − 3)/(2x^2 −6x) fully?


Find the stationary points of y = x^3 -3x^2 - 9x +5


Solve x^2 + x/2 =5


What is a vector and how do I calculate the 'modulus' of a vector?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences