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Diketahui vektor  dan . Hitunglah !

Diketahui vektor begin mathsize 14px style a with rightwards arrow on top equals open parentheses table row 3 row cell negative 1 end cell row 2 end table close parentheses comma space b with rightwards arrow on top equals open parentheses table row 2 row 2 row cell negative 3 end cell end table close parentheses end style dan begin mathsize 14px style c with rightwards arrow on top equals open parentheses table row cell negative 1 end cell row 1 row 2 end table close parentheses end style. Hitunglah begin mathsize 14px style 2 a with rightwards arrow on top plus 3 b with rightwards arrow on top minus 4 c with rightwards arrow on top end style!

Jawaban:

begin mathsize 14px style 2 a with rightwards arrow on top plus 3 b with rightwards arrow on top minus 4 c with rightwards arrow on top equals 2 open parentheses table row 3 row cell negative 1 end cell row 2 end table close parentheses plus 3 open parentheses table row 2 row 2 row cell negative 3 end cell end table close parentheses minus 4 open parentheses table row cell negative 1 end cell row 1 row 2 end table 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 equals open parentheses table row 6 row cell negative 2 end cell row 4 end table close parentheses plus open parentheses table row 6 row 6 row cell negative 9 end cell end table close parentheses minus open parentheses table row cell negative 4 end cell row 4 row 8 end table 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 equals open parentheses table row 16 row 0 row cell negative 13 end cell end table close parentheses end style 

Jadi, hasil dari begin mathsize 14px style 2 a with rightwards arrow on top plus 3 b with rightwards arrow on top minus 4 c with rightwards arrow on top end style  adalah begin mathsize 14px style open parentheses table row 16 row 0 row cell negative 13 end cell end table close parentheses end style

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