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F u n g s i f d in y a t akan d e n g an r u m u s a d a l ah ...

  space f left parenthesis x right parenthesis space equals space a x space plus space b. space J i k a space f left parenthesis negative 5 right parenthesis space equals space 15 space d a n space f left parenthesis 5 right parenthesis space equals space long dash 5 comma space n i l a i space d a r i space f left parenthesis 1 right parenthesis 

 

  1. —2

  2. 5

  3. 3

  4. 7

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F. Kurnia

Master Teacher

Mahasiswa/Alumni Universitas Jember

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Pembahasan

f left parenthesis x right parenthesis equals a x plus b space  f left parenthesis negative 5 right parenthesis equals space minus 5 a plus b equals 15 space space space  bottom enclose f left parenthesis 5 right parenthesis equals 5 a plus b equals space minus 5 space space space space space space space space space space space space minus end enclose space  minus 10 a equals 20 space  a equals space minus 20 over 10 equals space minus 2 space    minus 5 a plus b equals 15 space  minus 5 left parenthesis negative 2 right parenthesis plus b equals 15 space  10 plus b equals 15 space  b equals 15 minus 10 space  b equals 5 space  S e h i n g g a space f left parenthesis x right parenthesis equals space minus 2 x plus 5 space  f left parenthesis 1 right parenthesis equals space minus 2 space left parenthesis 1 right parenthesis plus 5 space  equals space minus 2 plus 5 space space  equals 3

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Fungsi g didefinisikan dengan rumus g ( x ) = q x + r . Nilai g ( 2 ) = − 7 d an g ( − 5 ) = 7 . Nilai g(4) adalah ...

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