KHI X9 THÌ 9 3A  = - 6 9 4         X X X X X X X X   B X X X X X X

1) - DAP AN MON TOAN 9 DOT 4

DAP AN MON TOAN 9 DOT 4

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Đáp án tham khảo

1) Khi x9 thì

^{9 3}

A







= - 6

9

4

         x x x x x x x x   B x x x x x x