已知两圆⊙C1:x2+y2+D1x+E1y-3=0和⊙C2:x2+y2+D2x+E2y-3=0都经过点A(2,-1),则同时经过点(D1,E1)和点(D2,E2
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已知两圆⊙C1:x2+y2+D1x+E1y-3=0和⊙C2:x2+y2+D2x+E2y-3=0都经过点A(2,-1),则同时经过点(D1,E1)和点(D2,E2)的直线方程为 |
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A.2x-y+2=0 B.x-y-2 =0 C.x-y+2 =0 D.2x+y-2=0 |
答案
A |
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