Mathematics, 30.11.2021 14:30 HecptyAura

cho ba đường thẳng d1) 2y+x+4=0 d2) x+y+5=0 d3) mx+(2m-1)y-m-14=0 . tìm giá trị của m để ba đường thẳng đã cho đồng qui

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cho ba đường thẳng d1) 2y+x+4=0 d2) x+y+5=0 d3) mx+(2m-1)y-m-14=0 . tìm giá trị của m để ba đường th...

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