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Diketahui vektor a = i + 3 j ​ ; b = 2 i + 2 1 ​ j ​ − 2 1 ​ k dan c = − 2 3 ​ i + k . Hasil dari 2 1 ​ a − b + c adalah ...

Diketahui vektor  Hasil dari  adalah ...

  1. begin mathsize 14px style negative 4 i with rightwards arrow on top plus j with rightwards arrow on top plus 1 half k with rightwards arrow on top end style 

  2. begin mathsize 14px style negative 4 i with rightwards arrow on top minus j with rightwards arrow on top minus 5 over 2 k with rightwards arrow on top end style 

  3. begin mathsize 14px style 4 i with rightwards arrow on top plus 1 half j with rightwards arrow on top minus k with rightwards arrow on top end style 

  4. begin mathsize 14px style negative 3 i with rightwards arrow on top plus j with rightwards arrow on top plus 1 half k with rightwards arrow on top end style 

  5. begin mathsize 14px style 3 i with rightwards arrow on top plus j with rightwards arrow on top plus 1 half k with rightwards arrow on top end style 

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D. Rajib

Master Teacher

Mahasiswa/Alumni Universitas Muhammadiyah Malang

Jawaban terverifikasi

Jawaban

jawaban yang tepar adalah D.

jawaban yang tepar adalah D.

Pembahasan

Penjumlahan vektor secara aljabar dapat dilakukan dengan menjumlahkan komponen yang seletak. Diketahui: Sehingga, hasil dari adalah . Jadi, jawaban yang tepar adalah D.

Penjumlahan vektor secara aljabar dapat dilakukan dengan menjumlahkan komponen yang seletak.

Diketahui:

begin mathsize 14px style a with rightwards arrow on top equals i with rightwards arrow on top plus 3 j with rightwards arrow on top b with rightwards arrow on top equals 2 i with rightwards arrow on top plus 1 half j with rightwards arrow on top minus 1 half k with rightwards arrow on top c with rightwards arrow on top equals negative 3 over 2 i with rightwards arrow on top plus k with rightwards arrow on top end style 

begin mathsize 14px style 1 half a with rightwards arrow on top minus b with rightwards arrow on top plus c with rightwards arrow on top equals 1 half open parentheses i with rightwards arrow on top plus 3 j with rightwards arrow on top minus 2 k with rightwards arrow on top close parentheses minus open parentheses 2 i with rightwards arrow on top plus 1 half j with rightwards arrow on top minus 1 half k with rightwards arrow on top close parentheses plus open parentheses negative 3 over 2 i with rightwards arrow on top plus k with rightwards arrow on top close parentheses equals open parentheses 1 half i with rightwards arrow on top plus 3 over 2 j with rightwards arrow on top minus k with rightwards arrow on top close parentheses minus open parentheses 2 i with rightwards arrow on top plus 1 half j with rightwards arrow on top minus 1 half k with rightwards arrow on top close parentheses plus open parentheses negative 3 over 2 i with rightwards arrow on top plus k with rightwards arrow on top close parentheses equals open parentheses 1 half i with rightwards arrow on top minus 2 i with rightwards arrow on top minus 3 over 2 i with rightwards arrow on top close parentheses plus open parentheses 3 over 2 j with rightwards arrow on top minus 1 half j with rightwards arrow on top close parentheses plus open parentheses negative k with rightwards arrow on top plus 1 half k with rightwards arrow on top plus k with rightwards arrow on top close parentheses equals open parentheses fraction numerator 1 minus 4 minus 3 over denominator 2 end fraction close parentheses i with rightwards arrow on top plus j with rightwards arrow on top plus open parentheses fraction numerator negative 2 plus 1 plus 2 over denominator 2 end fraction close parentheses k with rightwards arrow on top equals negative 3 i with rightwards arrow on top plus j with rightwards arrow on top plus 1 half k with rightwards arrow on top end style

Sehingga, hasil dari begin mathsize 14px style 1 half a with rightwards arrow on top minus b with rightwards arrow on top plus c with rightwards arrow on top end style adalah begin mathsize 14px style negative 3 i with rightwards arrow on top plus j with rightwards arrow on top plus 1 half k with rightwards arrow on top end style.

Jadi, jawaban yang tepar adalah D.

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