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Nilai  jika  dan  adalah ....

Nilai f left parenthesis x right parenthesis jika left parenthesis f ring operator g right parenthesis left parenthesis x right parenthesis equals 4 x plus 6 dan g left parenthesis x right parenthesis equals 2 x plus 5 adalah ....

  1. ....

  2. ....

Jawaban:

Ingat bahwa : f left parenthesis x right parenthesis equals open parentheses f ring operator g ring operator g to the power of negative 1 end exponent close parentheses left parenthesis x right parenthesis

Diperoleh g to the power of negative 1 end exponent left parenthesis x right parenthesis equals fraction numerator x minus 5 over denominator 2 end fraction

Maka,

table attributes columnalign right center left columnspacing 0px end attributes row cell f left parenthesis x right parenthesis end cell equals cell open parentheses f ring operator g ring operator g to the power of negative 1 end exponent close parentheses left parenthesis x right parenthesis end cell row blank equals cell left parenthesis f ring operator g right parenthesis left parenthesis g to the power of negative 1 end exponent left parenthesis x right parenthesis right parenthesis end cell row blank equals cell 4 open parentheses fraction numerator x minus 5 over denominator 2 end fraction close parentheses plus 6 end cell row blank equals cell 2 x minus 4 end cell end table

Jadi, f left parenthesis x right parenthesis equals 2 x minus 4.

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