方程x平方+y平方-x+y+k＝0表示一个圆,则实数k取值范围是多少
人气：179 ℃ 时间：2020-03-26 19:37:55
解答
配方得：(x-1/2)^2+(y+1/2)^2=1/2-k
因此有：1/2-k>0
即：k
推荐
猜你喜欢
- His father is f_____ years old.
- 四个字的词语（表示看的）
- 甲乙丙丁的和是100,甲加4,乙减4,丙乘4,丁除4,四个数就正好相等,求甲乙丙丁各是多少?
- afteroon,morning,noon,night加介词.是不是in the afternoon,in the morning,at noon,at night.
- First,he wants to make some phone calls to his classmates、意思
- 填成语（要填人体器官或部位的名称）
- A book has 120 pages numbered l,2,3,and so .
- The 29th Olympic Games ______ held successfully in Beijing.A.are B.were C.is D.will be
