标题: 求助一无解数学。。。郁闷ING [打印本页] 作者: LJWISC1OL 时间: 2010-10-28 00:48 标题: 求助一无解数学。。。郁闷ING In the xy-plane, the points (c, d), (c, -d), and (-c, -d) are three vertices of a certain square.If c < 0 and d > 0, which of the following points is in the same quadrant as the fourth vertex of the square?
A.(-5, -3) B.(-5, 3) C.(5, -3) D.(3, -5) E.(3, 5)
我只能判断，另外一个点大概是（-C,D)是两个正数，所以选了E
ANSWER IS E 不知道如果计算出来。 回答的都是好人，积累RP
今日GWD Q错3，V错10。。。有700不？作者: gilgemash 时间: 2010-10-28 01:11
根据选项，得出： 1. l c l=5 l d l=3 2. l c l=3 l d l=5