Cho 7 so khac nhau va 7 so deu la so nguyen to:
a,b,c,a+b+c,a+b-c,a+c-b,b+c-a
Trong 3 so a, b, c co 2 so co tong la 800
Goi d la hieu cua so lon nhat va so nho nhat trong 7 so
1. Cmr: d 1594
2.Chi ra 7 so co dang tren va dat dau '='
-------Mot bai thi vo dich--------
Started By HSNVA, 29-10-2005 - 20:43
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