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A g a r t i t ik A ( − 1 , 3 , 2 ) , B ( − 2 , 5 , − 1 ) d an C ( 2 , y , z ) se g a r i s , maka y + z = ⋯

  1. -10

  2. 12

  3. 14

  4. 9

  5. 8

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F. Kurnia

Master Teacher

Mahasiswa/Alumni Universitas Jember

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J i k a space t i t i k minus t i t i k space A comma space B comma space d a n space C space s e g a r i s comma space m a k a space g a r i s space left parenthesis A B right parenthesis space ⃗ space d a n space g a r i s space left parenthesis A C right parenthesis space ⃗ space b e r h i m p i tan comma space  s e h i n g g a space m e m i l i k i space a r a h space y a n g space s a m a comma space n a m u n space m e m i l i k i space p a n j a n g space y a n g space b e r b e d a. space  S e h i n g g a space d a p a t space d i n y a t a k a n space d e n g a n  stack A B with rightwards arrow on top equals n. stack A C with rightwards arrow on top  D a r i space k o o r d I n a t space t i t i k minus t i t i k space y a n g space d i k e t a h u i comma space d i d a p a t space b a h w a  stack A B with rightwards arrow on top equals open parentheses table row cell x subscript B end cell cell x subscript A end cell row cell y subscript B end cell cell y subscript A end cell row cell z subscript B end cell cell z subscript A end cell end table close parentheses space equals space open parentheses table row cell negative 2 end cell minus cell left parenthesis negative 1 right parenthesis end cell row 5 space cell negative 3 end cell row cell negative 1 end cell minus 2 end table close parentheses space equals space open parentheses table row cell negative 1 end cell row 2 row cell negative 3 end cell end table close parentheses  d a n  stack A C with rightwards arrow on top equals open parentheses table row cell x subscript C end cell cell x subscript A end cell row cell y subscript C end cell cell y subscript A end cell row cell z subscript C end cell cell z subscript A end cell end table close parentheses space space equals space open parentheses table row cell negative 2 end cell minus cell left parenthesis negative 1 right parenthesis end cell row y space cell negative 3 end cell row z minus 2 end table close parentheses space equals space open parentheses table row 3 row cell y minus 3 end cell row cell z minus 2 end cell end table close parentheses  D a r i space p e r s a m a a n space s e b e l u m n y a comma space d i d a p a t  stack A B with rightwards arrow on top equals n. stack A C with rightwards arrow on top  open parentheses table row cell negative 1 end cell row 2 row cell negative 3 end cell end table close parentheses space equals space n. space space open parentheses table row 3 row cell y minus 3 end cell row cell z minus 2 end cell end table close parentheses  J i k a space d i p e r h a t i k a n space b a r i s space p e r t a m a comma space m a k a  minus 1 equals n.3 space  space space space n equals negative 1 third  S e h i n g g a space d a r i space b a r i s space k e d u a space d i d a p a t  2 equals n. left parenthesis y minus 3 right parenthesis space  2 equals space minus 1 third. space left parenthesis y minus 3 right parenthesis space  minus 6 equals y minus 3 space  space space space space y equals negative 3  D a n space d a r i space b a r i s space k e t i g a space d i d a p a t  minus 3 equals n. space left parenthesis z minus 2 right parenthesis space  minus 3 equals negative 1 third. space left parenthesis z minus 2 right parenthesis space  space space space space space space 9 equals z minus 2  space space space space space space space z equals 11  A k i b a t n y a space d i d a p a t space b a h w a space  y plus z equals negative 3 plus 11 equals 8

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