\(\frac{10^3+2.5^3+5^3}{55}\)
\(=\frac{5^3+\left(2^3+2+1\right)}{55}\)
\(=\frac{5^3.11}{5.11}\)
\(=5^2=25\)
ta có đề bài
\(=\frac{2^3.5^3+2.5^3+5^3}{5.11}=\frac{5^3\left(2^3+2+1\right)}{5.11}\) \(=\frac{5^3.11}{5.11}=5^2=25\)
\(\frac{10^3+2.5^3+5^3}{55}\)
=\(\frac{5^3\left(2^3+2+1\right)}{55}\)
=\(\frac{5^3.11}{5.11}\)
=\(5^2=25\)
Ko chép lại đề
= 23. 53 + 2. 53 + 53 / 55
= 53. ( 23 + 2 + 1 )/55
= 53. 11 /55 = 53 /5 = 52= 25
\(\frac{10^3+2\cdot5^3+5^3}{55}\)
\(=\frac{1000+2\cdot125+125}{55}\)
\(=\frac{125\left(8+2+1\right)}{55}\)
\(=\frac{125\cdot11}{55}\)
\(=\frac{25\cdot55}{55}=25\)
