Tìm x;y $\epsilon$N* sao cho $2x+1 \vdots y$ và $2y+1\vdots x$
Tìm x;y $\epsilon$N* sao cho $2x+1 \vdots y$ và $2y+1\vdots x$
Started By tiendungthachthat, 13-11-2016 - 10:08
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