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\(\frac{6^8.16^5}{2^{27}.27^3}\)
\(=\frac{\left(2.3\right)^8.\left(2^4\right)^5}{2^{27}.\left(3^3\right)^3}\)
\(=\frac{2^8.3^8.2^{20}}{2^{27}.3^9}\)
\(=\frac{2^{28}.3^8}{2^{27}.3^9}\)
\(=\frac{2}{3}\)
Ta có: \(\frac{6^8.16^5}{2^{27}.27^3}\)
=\(\frac{\left(2.3\right)^8.\left(2^4\right)^5}{2^{27}.\left(3^3\right)^3}\)
=\(\frac{2^8.3^8.2^{20}}{2^{27}.3^9}\)
=\(\frac{2^{27}.2.3^8}{2^{27}.3^8.3}\)
=\(\frac{2}{3}\)
Hok tốt
\(\left|x+\frac{1}{3}\right|+\frac{4}{5}=\left|-3,2+\frac{2}{5}\right|+\left(27-\frac{3}{5}\right)\left(27-\frac{3^2}{6}\right)...\left(27-\frac{3^5}{9}\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
\(\Leftrightarrow\left|x+\frac{1}{3}\right|+\frac{4}{5}=\frac{14}{5}+\left(27-\frac{3^2}{6}\right)\left(27-\frac{3^3}{7}\right)...\left(27-27\right)...\left(27-\frac{3^{2010}}{2014}\right)\)
\(\Leftrightarrow\left|x+\frac{1}{3}\right|+\frac{4}{5}=\frac{14}{5}\)
\(\Leftrightarrow\left|x+\frac{1}{3}\right|=2\)
\(\Rightarrow\hept{\begin{cases}x+\frac{1}{3}=2\\x+\frac{1}{3}=-2\end{cases}\Rightarrow\hept{\begin{cases}x=\frac{5}{3}\\x=-\frac{7}{3}\end{cases}}}\)
bạn ơi, có một chỗ chưa chuẩn .bạn kiểm tra lại giú mình. chỗ vế trái bạn thiếu \(\left(27-\frac{3}{5}\right)\). bạn bổ sung vào cho đúng nhé. dù sao vẫn cảm ơn bạn.
\(A=\frac{2^{30}.5^7+2^{13}.5^{27}}{2^{27}.5^7+2^{10}.5^{27}}\)
\(=\frac{2^3\left(2^{27}.5^7+2^{10}.5^{27}\right)}{2^{27}.5^7+2^{10}.5^{27}}\)
\(=2^3=8\)
\(\frac{6^8\cdot16^5}{2^{27}\cdot27^3}=\frac{\left(2\cdot3\right)^8\cdot\left(2^4\right)^5}{2^{27}\cdot\left(3^3\right)^3}\)
\(=\frac{2^8\cdot3^8\cdot2^{20}}{2^{27}\cdot3^3}=\frac{2^{28}\cdot3^8}{2^{27}\cdot3^9}=\frac{2}{3}\)