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圆的方程

> （15分）已知以点C (t, )(t∈R , t ≠ 0)为圆心的圆与轴交于点O、A，与y轴交于点O、B，其中O为原点．（1）求证：△OAB的面积为定值；（2）设直线y = –2x+4与圆C交于点M, N，若OM = ON，求t的值并求出圆C的方程．

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发布时间：2024-09-11

（15分）已知以点C (t, )(t∈R , t ≠ 0)为圆心的圆与轴交于点O、A，与y轴交于点O、B，其中O为原点．（1）求证：△OAB的面积为定值；（2）设直线y = –2x+4与圆C交于点M, N，若OM = ON，求t的值并求出圆C的方程．

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（15分）已知以点C (t, )(t∈R , t ≠ 0)为圆心的圆与 轴交于点O、A，与y轴交于点O、B，其中O为原点．（1）求证：△OAB的面积为定值；（2）设直线y = –2x+4与圆C交于点M, N，若OM = ON，求t的值并求出圆C的方程．

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（15分）已知以点C (t, )(t∈R , t ≠ 0)为圆心的圆与轴交于点O、A，与y轴交于点O、B，其中O为原点．（1）求证：△OAB的面积为定值；（2）设直线y = –2x+4与圆C交于点M, N，若OM = ON，求t的值并求出圆C的方程．