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Composite Functions

2190243

Hi,

I did composite functions in Y10 but haven't understood them since. I'm in Y11 and need to learn how to solve them for an upcoming exam.

Thanks in advance :smile:

(edited 7 years ago)

Reply 1

RDKGames

Study Forum Helper

Original post by iHammmy

Hi,

I did composite functions in Y10 but haven't understood them since. I'm now in Y11.

Thanks in advance

Good to know.

Reply 2

2190243

Original post by RDKGames

Good to know.

thanks

(edited 7 years ago)

Reply 3

RDKGames

Study Forum Helper

Original post by iHammmy

check edit

Let

f(x)=x^2

and

g(x)=2x+1

Then

fg(x)=f[g(x)]=f[2x+1]=(2x+1)^2

gf(x)=g[f(x)]=g[x^2]=2x^2+1

Composite functions: one function in another.

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