$Cho (a-b,ab+1)=(a+b,ab-1)=1,a>b,a,b\epsilon N*. CMR: (a-b)^2+(ab+1)^2 khong chinhphuong. Ps:minhlamduocbainaymakhongungdk(a-b,ab+1)=1.Moinguoicoicoduockhong?$
CMR:
Started By DangHuyNgheAn, 05-11-2014 - 21:56
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