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[" 26.If "(1)/(m+in)-(x-iy)/(x+iy)=0" ,w...

[" 26.If "(1)/(m+in)-(x-iy)/(x+iy)=0" ,where "x" ,"y" ."m" ,"n" are real and "x+y=0" ."],[m+in!=0" ,prove that "m^(2)+n^(2)=1]

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