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Diketahui dua vektor u dan v . Jika , dan , maka = ...

Diketahui dua vektor  dan  . Jika begin mathsize 14px style open vertical bar u with rightwards arrow on top close vertical bar equals 8 comma open vertical bar v with rightwards arrow on top close vertical bar equals 10 end style , dan begin mathsize 14px style u with rightwards arrow on top open parentheses u with rightwards arrow on top plus v with rightwards arrow on top close parentheses equals 108 end style , maka begin mathsize 14px style v with rightwards arrow on top open parentheses v with rightwards arrow on top minus u with rightwards arrow on top close parentheses end style = ...

  1. 44

  2. 48

  3. 56

  4. 64

  5. 72

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begin mathsize 14px style u with rightwards arrow on top bullet open parentheses u with rightwards arrow on top plus v with rightwards arrow on top close parentheses equals 108 u with rightwards arrow on top bullet u with rightwards arrow on top plus u with rightwards arrow on top bullet v with rightwards arrow on top equals 108 open vertical bar u with rightwards arrow on top close vertical bar squared plus u with rightwards arrow on top bullet v with rightwards arrow on top equals 108 open parentheses 8 close parentheses squared plus u with rightwards arrow on top bullet v with rightwards arrow on top equals 108 64 plus u with rightwards arrow on top bullet v with rightwards arrow on top equals 108 u with rightwards arrow on top bullet v with rightwards arrow on top equals 108 minus 64 u with rightwards arrow on top bullet v with rightwards arrow on top equals 44 end style

Selanjutnya

begin mathsize 14px style v with rightwards arrow on top bullet open parentheses v with rightwards arrow on top minus u with rightwards arrow on top close parentheses equals v with rightwards arrow on top bullet v with rightwards arrow on top minus v with rightwards arrow on top bullet u with rightwards arrow on top equals open vertical bar v with rightwards arrow on top close vertical bar squared minus v with rightwards arrow on top bullet u with rightwards arrow on top equals open parentheses 10 close parentheses squared minus 44 equals 100 minus 44 equals 56 end style   

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