Diketahui matriks A = ( x+1  2), B = (   x      3   ), dan C ( 3  5). Jika A + B = C

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                                    3    5             2    y+ 2               5  4 

Maka nilai x + y adalah….

Diketahui matriks A = ( x+1  2), B = (   x      3   ), dan C ( 3  5). Jika A + B = C

Jawaban Terkonfirmasi

left[begin{array}{cc}{x+1}&2\3&5\end{array}right] + left[begin{array}{cc}x&3\2&{y+2}\end{array}right] = left[begin{array}{cc}3&5\5&4\end{array}right] \\ left[begin{array}{cc}{(x+1)+x}&2+3\3+2&5+(y+2)\end{array}right] = left[begin{array}{cc}3&5\5&4\end{array}right] \\ left[begin{array}{cc}{2x+1}&5\5&{y+6}\end{array}right] = left[begin{array}{cc}3&5\5&4\end{array}right] \\ maka\ 2x+1=3 rightarrow x=1\ y+6=4 rightarrow y=-2\ sehingga x+y=1+(-2)=-1