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gamhotngason
2 năm trước
Giúp mình với Cho 3 đường thẳng (d1) y=1/3x+3, (d2) y=2,(d3) y=(k-1)x+k A tìm k để d1, d2,d3 đồng qui B Vẽ d1,d2,d3 với k vừa tìm được
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