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Komponen vektor satuan dari vektor , Jika  adalah ...

Komponen vektor satuan dari vektor begin mathsize 14px style u with rightwards arrow on top end style, Jika undefined adalah vektor negatif dari begin mathsize 14px style a with rightwards arrow on top equals negative 12 i with rightwards arrow on top minus 5 j with rightwards arrow on top end style adalah ...

  1. begin mathsize 14px style 12 over 13 i with rightwards arrow on top plus 6 over 13 j with rightwards arrow on top end style 

  2. begin mathsize 14px style 12 over 13 i with rightwards arrow on top plus 5 over 13 j with rightwards arrow on top end style 

  3. begin mathsize 14px style 12 over 13 i with rightwards arrow on top minus 5 over 13 j with rightwards arrow on top end style 

  4. begin mathsize 14px style 11 over 13 i with rightwards arrow on top plus 5 over 13 j with rightwards arrow on top end style 

  5. begin mathsize 14px style 11 over 13 i with rightwards arrow on top minus 5 over 13 j with rightwards arrow on top end style 

Jawaban:

begin mathsize 14px style u with rightwards arrow on top equals negative a with rightwards arrow on top space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space open vertical bar u with rightwards arrow on top close vertical bar equals square root of 12 squared plus 5 squared end root u with rightwards arrow on top equals negative open parentheses negative 12 i with rightwards arrow on top minus 5 j with rightwards arrow on top close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space space square root of 144 plus 25 end root space space space space space space space space space space space space u with rightwards arrow on top equals 12 i with rightwards arrow on top plus 5 j with rightwards arrow on top space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals square root of 169 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 13 end style

Vektor satuanbegin mathsize 14px style equals fraction numerator u with rightwards arrow on top over denominator open vertical bar u with rightwards arrow on top close vertical bar end fraction end style

                          begin mathsize 14px style equals fraction numerator 12 i with rightwards arrow on top plus 5 j with rightwards arrow on top over denominator 13 end fraction equals 12 over 13 i with rightwards arrow on top plus 5 over 13 j with rightwards arrow on top end style

Jadi. jawaban yang tepat adalah B.

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