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Jika g –1 ( x ) = x –1 dan ( f ∘ g ) ( x ) = x 2 + 3 x + 1 , maka f(x) =....

Jika  dan , maka f(x) =....

  1. straight x squared plus straight x – 1 space

  2. straight x squared plus 2 straight x – 1 space

  3. straight x squared plus 3 straight x – 1 space

  4. straight x squared plus 4 straight x – 1 space

  5. straight x squared plus 5 straight x – 1 space

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N. Rahayu

Master Teacher

Mahasiswa/Alumni Universitas Negeri Jakarta

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Pembahasan

maka Maka nilai f(x) adalah

straight g to the power of negative 1 end exponent open parentheses straight x close parentheses equals straight x minus 1 maka straight g open parentheses straight x close parentheses equals straight x plus 1

Maka nilai f(x) adalah

open parentheses straight f ring operator straight g close parentheses open parentheses straight x close parentheses space equals space straight x squared space plus space 3 straight x space plus 1 space space straight f open parentheses straight g open parentheses straight x close parentheses close parentheses space equals space straight x squared space plus space 3 straight x space plus 1 space space straight f open parentheses straight x plus 1 close parentheses space equals space straight x squared space plus space 3 straight x space plus 1 space space straight f open parentheses straight x close parentheses space equals space open parentheses straight x space – 1 close parentheses squared space plus space 3 open parentheses straight x space – 1 space close parentheses plus 1 f left parenthesis x right parenthesis equals x squared minus 2 x plus 1 plus 3 x minus 3 plus 1 space f left parenthesis x right parenthesis equals x squared plus x minus 1

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