直线l:(2m²+m-3)x+(m²-m)y=m²-1的倾斜角为3π/4,求m
问题描述:
直线l:(2m²+m-3)x+(m²-m)y=m²-1的倾斜角为3π/4,求m
答
k=-(2m²+m-3)/(m²-m)=tan3π/4=-1,
∴m^2+2m-3=0
∴m=-3或m=1