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Jika g x = x +1 dan f ∘ g x = x 2 +3 x +1 maka f x =…

Jika begin mathsize 14px style g open parentheses x close parentheses equals x plus 1 end style dan begin mathsize 14px style open parentheses f ring operator g close parentheses open parentheses x close parentheses equals x squared plus 3 x plus 1 end style maka begin mathsize 14px style f open parentheses x close parentheses equals horizontal ellipsis end style

  1. begin mathsize 14px style x squared plus 5 x plus 5 end style

  2. begin mathsize 14px style x squared plus x minus 1 end style

  3. begin mathsize 14px style x squared plus 4 x plus 3 end style

  4. begin mathsize 14px style x squared plus 6 x plus 1 end style

  5. begin mathsize 14px style x squared plus 3 x minus 1 end style

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N. Rahayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Pembahasan

begin mathsize 14px style open parentheses f ring operator g close parentheses open parentheses x close parentheses equals x squared plus 3 x plus 1 f open parentheses g open parentheses x close parentheses close parentheses equals x squared plus 3 x plus 1 f open parentheses x plus 1 close parentheses equals x squared plus 3 x plus 1  M i s a l k a n space x plus 1 equals a rightwards arrow x equals a minus 1 f open parentheses a close parentheses equals open parentheses a minus 1 close parentheses squared plus 3 open parentheses a minus 1 close parentheses plus 1 f open parentheses a close parentheses equals a squared minus 2 a plus 1 plus 3 a minus 3 plus 1 f open parentheses a close parentheses equals a squared plus a minus 1  K e m b a l i k a n space a space k e space x space m a k a f open parentheses x close parentheses equals x squared plus x minus 1 end style

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