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Diketahui dan g(x) = 3x + 5. Fungsi komposisi (f ∘...

Diketahui f open parentheses x close parentheses equals x squared minus 4 x plus 2 dan g(x) = 3x + 5. Fungsi komposisi (f ∘ g)(x)=....

  1. 3 x squared minus 4 x plus 5

  2. 3 x squared minus 12 x plus 7

  3. 3 x squared minus 12 x plus 11

  4. 9 x squared plus 18 x plus 7

  5. 9 x squared plus 26 x plus 27

Jawaban:

g open parentheses x close parentheses equals 3 x plus 5  f open parentheses x close parentheses equals x squared minus 4 x plus 2    open parentheses f ring operator g close parentheses open parentheses x close parentheses equals f open parentheses g open parentheses x close parentheses close parentheses  equals f left parenthesis 3 x plus 5 right parenthesis  equals open parentheses 3 x plus 5 close parentheses squared minus 4 open parentheses 3 x plus 5 close parentheses plus 2  equals 9 x squared plus 30 x plus 25 minus 12 x minus 20 plus 2  equals 9 x squared plus 18 x plus 7

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