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Pertanyaan

Jika a = 5 i − 3 j ​ + 6 k dan b = − 2 i + 2 j ​ + 3 k maka 2 a − 3 b = ...

Jika   dan  maka 

  1. 5 i with rightwards arrow on top minus 12 j with rightwards arrow on top plus 9 k with rightwards arrow on top

  2. 16 i with rightwards arrow on top minus 12 j with rightwards arrow on top plus 3 k with rightwards arrow on top

  3. 16 i with rightwards arrow on top minus 10 j with rightwards arrow on top plus 3 k with rightwards arrow on top

  4. 16 i with rightwards arrow on top minus 9 j with rightwards arrow on top plus 3 k with rightwards arrow on top

  5. 16 i with rightwards arrow on top minus 9 j with rightwards arrow on top plus 6 k with rightwards arrow on top

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G. Albiah

Master Teacher

Mahasiswa/Alumni Universitas Galuh Ciamis

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah B.

jawaban yang benar adalah B.

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Pembahasan

Diketahui bahwa dan maka , Oleh karena itu, jawaban yang benar adalah B.

Diketahui bahwa  a with rightwards arrow on top equals 5 i with rightwards arrow on top minus 3 j with rightwards arrow on top plus 6 k with rightwards arrow on top dan b with rightwards arrow on top equals negative 2 i with rightwards arrow on top plus 2 j with rightwards arrow on top plus 3 k with rightwards arrow on top maka ,

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 a with rightwards arrow on top minus 3 b with rightwards arrow on top end cell equals cell 2 open parentheses table row 5 row cell negative 3 end cell row 6 end table close parentheses minus 3 open parentheses table row cell negative 2 end cell row 2 row 3 end table close parentheses end cell row blank equals cell open parentheses table row 10 row cell negative 6 end cell row 12 end table close parentheses minus open parentheses table row cell negative 6 end cell row 6 row 9 end table close parentheses end cell row blank equals cell open parentheses table row cell 10 plus 6 end cell row cell negative 6 minus 6 end cell row cell 12 minus 9 end cell end table close parentheses end cell row blank equals cell open parentheses table row 16 row cell negative 12 end cell row 3 end table close parentheses end cell end table

Oleh karena itu, jawaban yang benar adalah B.

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