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Perhatikan gambar berikut. Vektor  adalah ....

Perhatikan gambar berikut.

Vektor begin mathsize 14px style open parentheses table row cell negative 7 end cell row cell negative 1 end cell end table close parentheses end style adalah ....

Jawaban:

Pada gambar dapat kita tentukan bahwa koordinat titik begin mathsize 14px style A left parenthesis 1 comma 3 right parenthesis comma end stylesize 14px space size 14px B size 14px left parenthesis size 14px 4 size 14px comma size 14px 1 size 14px right parenthesis size 14px commasize 14px space size 14px C size 14px left parenthesis size 14px 8 size 14px comma size 14px 4 size 14px right parenthesis. Ingat bahwa, vektor 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell A C end cell equals cell open parentheses table row cell x subscript c minus x subscript a end cell row cell y subscript c minus y subscript a end cell end table close parentheses end cell row blank blank cell rightwards arrow A C equals open parentheses table row cell 8 minus 1 end cell row cell 4 minus 3 end cell end table close parentheses end cell row blank blank cell rightwards arrow A C equals open parentheses table row 7 row 1 end table close parentheses end cell row cell C A end cell equals cell negative A C end cell row blank rightwards arrow cell C A equals negative open parentheses table row 7 row 1 end table close parentheses end cell row blank equals cell open parentheses table row cell negative 7 end cell row cell negative 1 end cell end table close parentheses end cell end table end style

Jadi, vektor begin mathsize 14px style open parentheses table row cell negative 7 end cell row cell negative 1 end cell end table close parentheses end style adalah begin mathsize 14px style stack C A with rightwards arrow on top end style.

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