Toán Lớp 6: CMR:Mọi số tự nhiên x,y thì
(20x+7y)$\vdots$31⇔(x+5y)$\vdots$31
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Toán Lớp 6: CMR:Mọi số tự nhiên x,y thì
(20x+7y)$\vdots$31⇔(x+5y)$\vdots$31
Comments ( 2 )
Moi so tu nhien x,y (20×+7y)÷31 (x+5y)÷31