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Diketahui a ⇀ + b ⇀ = 5 i − 10 j ​ . Jika b ⇀ = − 3 i + 4 j ​ . Tentukan 2 1 ​ a ⇀ .

Diketahui . Jika . Tentukan .

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A. Salim

Master Teacher

Mahasiswa/Alumni Universitas Pelita Harapan

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 Error converting from MathML to accessible text.  

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Pembahasan

Dengan menerapkan operasi pengurangan vektor dan perkalian skalar dengan vektor. Maka: vektor sehingga diperoleh: Jadi,

Dengan menerapkan operasi pengurangan vektor dan perkalian skalar dengan vektor.

begin mathsize 14px style straight b with rightwards harpoon with barb upwards on top equals negative 3 straight i plus 4 straight j straight b with rightwards harpoon with barb upwards on top equals open parentheses table row cell negative 3 end cell row 4 end table close parentheses end style 

Maka: 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight a with rightwards harpoon with barb upwards on top plus straight b with rightwards harpoon with barb upwards on top end cell equals cell 5 straight i minus 10 straight j end cell row cell straight a with rightwards harpoon with barb upwards on top plus straight b with rightwards harpoon with barb upwards on top end cell equals cell open parentheses table row 5 row cell negative 10 end cell end table close parentheses end cell row cell straight a with rightwards harpoon with barb upwards on top plus straight b with rightwards harpoon with barb upwards on top minus straight b with rightwards harpoon with barb upwards on top end cell equals cell open parentheses table row 5 row cell negative 10 end cell end table close parentheses minus open parentheses table row cell negative 3 end cell row 4 end table close parentheses end cell row cell straight a with rightwards harpoon with barb upwards on top end cell equals cell open parentheses table row cell 5 minus left parenthesis negative 3 right parenthesis end cell row cell negative 10 minus 4 end cell end table close parentheses end cell row blank equals cell open parentheses table row 8 row cell negative 14 end cell end table close parentheses end cell end table end style 

vektor begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell straight a with rightwards harpoon with barb upwards on top end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row 8 row cell negative 14 end cell end table close parentheses end cell end table end style sehingga diperoleh:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 1 half straight a with rightwards harpoon with barb upwards on top end cell equals cell 1 half open parentheses table row 8 row cell negative 14 end cell end table close parentheses end cell row blank equals cell open parentheses table row 4 row cell negative 7 end cell end table close parentheses end cell end table end style 

Jadi, Error converting from MathML to accessible text.  

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