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Pertanyaan

Diketahui △ ABC dengan koordinat A ( 2 , − 1 , − 1 ) , B ( − 1 , 4 , − 2 ) dan C ( 5 , 0 , − 3 ) . Tentukan: Proyeksi vektor ortogonal AB pada AC

Diketahui  dengan koordinat  dan 
Tentukan: 

  • Proyeksi vektor ortogonal  pada    

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L. Rante

Master Teacher

Mahasiswa/Alumni Universitas Negeri Makassar

Jawaban terverifikasi

Jawaban

proyeksi vektor ortogonal pada adalah .

  proyeksi vektor ortogonal AB with rightwards arrow on top pada AC with rightwards arrow on top adalah open parentheses negative 3 over 7 comma space minus 1 over 7 comma space 2 over 7 close parentheses

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Pembahasan

DIketahui dengan koordinat dan . Maka Sehingga Maka proyeksi vektor ortogonal pada adalah Jadi, proyeksi vektor ortogonal pada adalah .

DIketahui triangle ABC dengan koordinat straight A open parentheses 2 comma space minus 1 comma space minus 1 close parentheses comma space straight B open parentheses negative 1 comma space 4 comma space minus 2 close parentheses dan straight C open parentheses 5 comma space 0 comma space minus 3 close parentheses.

Maka

table attributes columnalign right center left columnspacing 0px end attributes row cell AB with rightwards arrow on top end cell equals cell straight B minus straight A end cell row blank equals cell open parentheses negative 1 comma space 4 comma space minus 2 close parentheses minus open parentheses 2 comma space minus 1 comma space minus 1 close parentheses end cell row blank equals cell open parentheses negative 3 comma space 5 comma space minus 1 close parentheses end cell row blank blank blank row cell AC with rightwards arrow on top end cell equals cell straight C minus straight A end cell row blank equals cell open parentheses 5 comma space 0 comma space minus 3 close parentheses minus open parentheses 2 comma space minus 1 comma space minus 1 close parentheses end cell row blank equals cell open parentheses 3 comma space 1 comma space minus 2 close parentheses end cell end table 

Sehingga

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar AC with rightwards arrow on top close vertical bar end cell equals cell square root of open parentheses 3 close parentheses squared plus open parentheses 1 close parentheses squared plus open parentheses negative 2 close parentheses squared end root end cell row blank equals cell square root of 9 plus 1 plus 4 end root end cell row blank equals cell square root of 14 end cell end table 

Maka proyeksi vektor ortogonal AB with rightwards arrow on top pada AC with rightwards arrow on top adalah 

table attributes columnalign right center left columnspacing 0px end attributes row cell straight c with rightwards arrow on top end cell equals cell fraction numerator AB with rightwards arrow on top times AC with rightwards arrow on top over denominator open vertical bar AC with rightwards arrow on top close vertical bar squared end fraction times AC with rightwards arrow on top end cell row blank equals cell fraction numerator open parentheses negative 3 comma space 5 comma space minus 1 close parentheses times open parentheses 3 comma space 1 comma space minus 2 close parentheses over denominator open parentheses square root of 14 close parentheses squared end fraction times open parentheses 3 comma space 1 comma space minus 2 close parentheses end cell row blank equals cell fraction numerator open parentheses negative 9 close parentheses plus open parentheses 5 close parentheses plus open parentheses 2 close parentheses over denominator 14 end fraction times open parentheses 3 comma space 1 comma space minus 2 close parentheses end cell row blank equals cell fraction numerator negative 2 over denominator 14 end fraction times open parentheses 3 comma space 1 comma space minus 2 close parentheses end cell row blank equals cell negative 1 over 7 times open parentheses 3 comma space 1 comma space minus 2 close parentheses end cell row blank equals cell open parentheses negative 3 over 7 comma space minus 1 over 7 comma space 2 over 7 close parentheses end cell end table 

Jadi,  proyeksi vektor ortogonal AB with rightwards arrow on top pada AC with rightwards arrow on top adalah open parentheses negative 3 over 7 comma space minus 1 over 7 comma space 2 over 7 close parentheses

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3

Geenaya Hazel Oktavia Manik

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