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Pertanyaan

Diketahui vektor a = 2 i − 7 j ​ dan b = 3 i + 4 j ​ . Tentukan: a. a + b

Diketahui vektor  dan . Tentukan:

a. 

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Jawaban terverifikasi

Jawaban

 a with rightwards arrow on top plus b with rightwards arrow on top equals open parentheses 2 i with rightwards arrow on top minus 7 j with rightwards arrow on top close parentheses plus open parentheses 3 i with rightwards arrow on top plus 4 j with rightwards arrow on top close parentheses equals 5 i with rightwards arrow on top minus 3 j with rightwards arrow on top

Pembahasan

Pembahasan
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Diketahui vektor dan . Jadi,

Diketahui vektor a with rightwards arrow on top equals 2 i with rightwards arrow on top minus 7 j with rightwards arrow on top dan b with rightwards arrow on top equals 3 i with rightwards arrow on top plus 4 j with rightwards arrow on top.

Jadi, a with rightwards arrow on top plus b with rightwards arrow on top equals open parentheses 2 i with rightwards arrow on top minus 7 j with rightwards arrow on top close parentheses plus open parentheses 3 i with rightwards arrow on top plus 4 j with rightwards arrow on top close parentheses equals 5 i with rightwards arrow on top minus 3 j with rightwards arrow on top

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Jika vektor m = − 2 i + 3 j ​ dan n = 5 i + 2 j ​ . Tentukanlah: b. − 4 m + 3 n

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