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Diketahui f : R → R dan g : R → R yang dideinisikan f ( x ) = x − 5 dan g ( x ) = x 2 − 3 x − 4 , komposisi fungsi ( g ∘ f ) ( x ) = ....

  1. x squared minus 3 x minus 9

  2. x squared minus 3 x minus 36

  3. x squared minus 13 x minus 14

  4. x squared minus 13 x plus 6

  5. x squared minus 13 x plus 36

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S. Nur

Master Teacher

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Pembahasan

g o f left parenthesis x right parenthesis space equals space g left parenthesis f left parenthesis x right parenthesis right parenthesis space equals space g left parenthesis x minus 5 right parenthesis space  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space left parenthesis x minus 5 right parenthesis squared space minus space 3 left parenthesis x minus 5 right parenthesis space minus 4 space  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals x squared space minus space 10 x space plus space 25 space minus space 3 x space plus space 15 space minus space 4  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals x squared minus 13 x plus 36

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Diketahui f ( x ) = x 2 + 4 x − 5 dan g ( x ) = 2 x − 1 . Hasil fungsi komposisi ( g ∘ f ) ( x ) adalah...

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