试题与答案

已知直线y=-2x+m,圆x2+y2+2y=0. (1)m为何值时,直线与圆相交

题型:解答题

题目:

已知直线y=-2x+m,圆x2+y2+2y=0.

(1)m为何值时,直线与圆相交?

(2)m为何值时,直线与圆相切?

(3)m为何值时,直线与圆相离?

答案:

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