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[" 104.If "ax+by=1,cx^(2)+dy^(2)=1" have...

[" 104.If "ax+by=1,cx^(2)+dy^(2)=1" have only one solution,then "],[[" (a) "(a^(2)/c)+(b^(2)/d)=1," (b) "x=(a/c)," (c) "y=(b/d)]]

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