Year 11 maths · F.1 · Functions
Compose two functions
Work out the inside function first, then put that into the outside.
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f(x) = −x + 1 and g(x) = 2x − 1. Find f(g(−1)).
Answer: 4
f(x) = 2x − 2 and g(x) = x − 4. Find f(g(−1)).
Answer: -12
f(x) = 2x − 3 and g(x) = x − 6. Find f(g(2)).
Answer: -11
Tip: Work out the inside function first, then put that into the outside.
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- Next in this topic Find a value of an inverse function Year 11
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