题目内容
直线2mx-(m2+1)y-
=0倾斜角的取值范围( )
m |
A.[0,π) | B.[0,
| C.[0,
| D.[0,
|
∵直线2mx-(m2+1)y-
=0的斜率k=
,
且m≥0,m2+1≥2m,
∴0≤k≤1,
∴直线2mx-(m2+1)y-
=0倾斜角的取值范围是[0,
].
故选:C.
m |
2m |
m2+1 |
且m≥0,m2+1≥2m,
∴0≤k≤1,
∴直线2mx-(m2+1)y-
m |
π |
4 |
故选:C.
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