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\(\frac{10^3+2.5^3+5^3}{65}=\frac{1000+5^3.3}{65}=\frac{1000+375}{65}\)
= \(\frac{1375}{65}=\frac{275}{13}\)
\(\frac{10^3+2.5^5+5^3}{65}\)
= \(\frac{\left(2.5\right)^3+2.5^5+5^3}{5.13}\)
= \(\frac{2^3.5^3+2.5^5+5^3}{5.13}\)
= \(\frac{5^3\left(2^3+2+1\right)}{5.13}\)
= \(\frac{5^2.11}{13}\)
= \(\frac{275}{13}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x=\frac{2^3\cdot25^2}{10^2\cdot5^3}=\frac{2^3\cdot\left(5^2\right)^2}{\left(2\cdot5\right)^2\cdot5^3}\)
\(=\frac{2^3\cdot5^4}{2^2\cdot5^2\cdot5^3}=\frac{2^3\cdot5^4}{2^2\cdot5^5}=\frac{2}{5}\)
Vậy x = 2/5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{\left(\frac{2}{5}\right)^7.5^7+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^7+512}\)
\(=\frac{\left(\frac{2}{5}.5\right)^7+\left(\frac{9}{4}:\frac{3}{16}\right)^3}{\left(2.5\right)^7+8^3}\)
\(=\frac{2^7+12^3}{10^7+8^3}\)
Từ đây tính nốt nha!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{10^3+2.5^3+5^3}{65}=\frac{10^3+5^3.\left(2+1\right)}{65}=\frac{10^3+5^3.3}{65}\)
= \(\frac{10^3+375}{65}=\frac{1375}{65}\)
\(\frac{10^3+2.5^3+5^3}{65}=\frac{1000+2.125+125}{65}=\frac{8.125+2.125+125.1}{65}=\frac{125\left(8+2+1\right)}{65}=\frac{125.11}{65}=\frac{1375}{65}=\frac{275}{13}\)