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Jawab:

Penjelasan dengan langkah-langkah:

komposisi fungsi

fog(x)=  f { g(x)}

gof(x)= g{ f(x)}

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soal

f(x)=  3x+ 1

g(x)= 1/ (x + 2)

a. gof(x) =

=  g( f(x))

= 1/ { f(x) + 2}

= 1 / {3x+1  + 2 }

= 1/ { 3x + 3}

b. fof(x) =

= f{ f(x)}

= 3. f(x) + 1

= 3 (3x + 1) + 1

= 9x + 3 + 1

= 9x + 4