Question

if f ratio r will be r be given by f(x)=(3-x)*2 then for (x)=?
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Answer 1

Answer:

f(x)=3x=2........ [ Given ]

⇒ f(f(x))=f(3x+2)

=[3(3x+2)+2]

=9x+6+2

=9x+8

∴ f(f(x))=9x+8