当m=1时,方程可化为l 1 :x+y+3=0,l 2 :x+y+2=0,显然有“l 1 ∥ l 2 ”成立;而若满足“l 1 ∥ l 2 ”成立,则必有 m 2 -(3m-2)=0 2m-3(3m-2)≠0 ,解得m=1,或m=2...
已知m为实数,直线l 1 :mx+y+3=0,l 2 :(3m-2)x+my+2=0,则“m=1”是“l 1 ∥ l 2
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