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[Data Sufficiency]

试题详情

题目:

In the xy-plane, point (r, s) lies on a circle with center at the origin.  What is the value of r2 + s2?
(1)     The circle has radius 2.
(2)     The point (√2, -√2) lies on the circle.

选项:

答案:

D

提问:

math

解答:

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阅读971
解答: sysadmin

提问:

请问由问题怎么看出来时问半径的平方?是因为 r 吗? 条件二怎么判断?

解答:

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阅读978
解答: sysadmin老师

提问:

math

解答:

点赞0
阅读972
解答: sysadmin老师

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