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Bila vektor a = p i - 2 j + q k a = p i − 2 j ​ + q k , vektor dan b = q +2 i +2 j +3 k . Jika a =- b a = − b , maka vektor a a adalah ..

            Bila vektor , vektor dan b with rightwards arrow on top equals open parentheses q plus 2 close parentheses i with hat on top plus 2 j with hat on top plus 3 k with hat on top. Jika , maka vektor adalah ..

  1. i with hat on top minus 2 j with hat on top plus 3 k with hat on top

  2. i with hat on top plus 2 j with hat on top plus 3 k with hat on top

  3. negative i with hat on top minus 2 j with hat on top plus 3 k with hat on top

  4. i with hat on top minus 2 j with hat on top minus 3 k with hat on top

  5. i with hat on top minus 2 j with hat on top plus 2 k with hat on top

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Pembahasan

a with rightwards arrow on top equals negative b with rightwards arrow on top  p i with hat on top minus 2 j with hat on top plus q k with hat on top equals negative open parentheses open parentheses q plus 2 close parentheses i with hat on top plus 2 j with hat on top plus 3 k with hat on top close parentheses  p i with hat on top minus 2 j with hat on top plus q k with hat on top equals negative open parentheses q plus 2 close parentheses i with hat on top minus 2 j with hat on top minus 3 k with hat on top  p i with hat on top plus q k with hat on top equals negative open parentheses q plus 2 close parentheses i with hat on top minus 3 k with hat on top    p equals negative open parentheses q plus 2 close parentheses    q equals negative 3    p equals negative open parentheses q plus 2 close parentheses equals negative open parentheses negative 3 plus 2 close parentheses equals negative open parentheses negative 1 close parentheses equals 1    a with rightwards arrow on top equals p i with hat on top minus 2 j with hat on top plus q k with hat on top equals i with hat on top minus 2 j with hat on top minus 3 k with hat on top

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