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Jika dan determinan matriks AB adalah 6, maka nilai a 2 − 3 a adalah … (SBMPTN 2013).

Jika Error converting from MathML to accessible text. dan determinan matriks AB adalah 6, maka nilai  adalah … (SBMPTN 2013).

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  5. 2

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Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang sesuai dengan pilihan adalah C.

jawaban yang sesuai dengan pilihan adalah C.

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Perhatikan perhitungan berikut ini! sehingga​​​​​​ Jadi, jawaban yang sesuai dengan pilihan adalah C.

Perhatikan perhitungan berikut ini!       

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank straight A end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row straight a 1 straight a row cell negative 1 end cell straight a 2 end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank straight B end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell negative 2 end cell 1 row 1 0 row 1 cell negative 1 end cell end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank AB end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row straight a 1 straight a row cell negative 1 end cell straight a 2 end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell negative 2 end cell 1 row 1 0 row 1 cell negative 1 end cell end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank AB end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell straight a open parentheses negative 2 close parentheses plus 1 open parentheses 1 close parentheses plus straight a open parentheses 1 close parentheses end cell cell straight a open parentheses 1 close parentheses plus 1 open parentheses 0 close parentheses plus straight a open parentheses negative 1 close parentheses end cell row cell negative 1 open parentheses negative 2 close parentheses plus straight a open parentheses 1 close parentheses plus 2 open parentheses 1 close parentheses end cell cell negative 1 open parentheses 1 close parentheses plus straight a open parentheses 0 close parentheses plus 2 open parentheses negative 1 close parentheses end cell end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank AB end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell negative 2 straight a plus 1 plus straight a end cell cell straight a minus straight a end cell row cell 2 plus straight a plus 2 end cell cell negative 1 minus 2 end cell end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank AB end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell 1 minus straight a end cell 0 row cell 4 plus straight a end cell cell negative 3 end cell end table close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell vertical line AB vertical line end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open vertical bar table row cell 1 minus straight a end cell 0 row cell 4 plus straight a end cell cell negative 3 end cell end table close vertical bar end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis 1 minus straight a right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis negative 3 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis 4 plus straight a right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis 0 right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank straight a end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 6 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank straight a end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 9 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank a end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table end style

sehingga ​​​​​​

begin mathsize 14px style a squared minus sign 3 a equals open parentheses 3 close parentheses squared minus sign 3 open parentheses 3 close parentheses equals 9 minus sign 9 equals 0 end style 

Jadi, jawaban yang sesuai dengan pilihan adalah C.

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Jika dan determinan matriks AB adalah 10, maka nilai 2 b - a adalah … (SBMPTN 2013).

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