Tìm x biết ​\(x \in BC\left( {26;260} \right),500 jwplayer.k...

* Hướng dẫn giải

 \(\begin{array}{l} 26 = 2.13\\ 260 = {2^2}.5.13\\ \Rightarrow BCNN\left( {26;260} \right) = {2^2}.5.13260\\ \Rightarrow BC\left( {26;260} \right) = B\left( {260} \right) = \left\{ {0;260;520;780;1040;1300;...} \right\}\\ ma\,\,500 < x < 600 \Rightarrow x = 520 \end{array} \)