Rút gọn \(\frac{15^3.8^2}{5^6.4^4}\)
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a) \(K=\frac{2^{11}\cdot9^2}{3^5\cdot16^2}=\frac{2^{11}\cdot3^4}{3^5\cdot2^8}=\frac{2^3}{3}=\frac{8}{3}\)
b) \(N=\frac{9^3\cdot27^2}{6^2\cdot3^{10}}=\frac{3^6\cdot3^6}{2^2\cdot3^2\cdot3^{10}}=\frac{1}{4}\)
c) \(P=\frac{27^{15}\cdot5^3\cdot8^4}{25^2\cdot81^{11}\cdot2^{11}}=\frac{3^{45}\cdot5^3\cdot2^{12}}{5^4\cdot3^{44}\cdot2^{11}}=\frac{3\cdot2}{5}=\frac{6}{5}\)
a) \(k=\frac{2^{11}.9^2}{3^5.16^2}=\frac{2^{11}.\left(3^2\right)^2}{3^5.\left(2^4\right)^2}=\frac{2^{11}.3^4}{3^5.2^8}=\frac{8.1}{3.1}=\frac{8}{3}\)
b) \(N=\frac{9^3.27^2}{6^2.3^{10}}=\frac{\left(3^2\right)^3.\left(3^3\right)^2}{\left(2.3\right)^2.3^{10}}=\frac{3^6.3^6}{2^2.3^2.3^{10}}=\frac{3^{12}}{4.3^{12}}=\frac{1}{4}\)
\(\frac{512^4.128^6.64^2.2^{13}.4^7}{1024^2.64^5.128^3.8^4.512^4}=\frac{2^{117}}{2^{119}}=\frac{2^{117}}{2^{117}.2^2}=\frac{1}{2^2}=\frac{1}{4}\)
\(\frac{6^5+6^6.7}{6^3+6^6.4}=\frac{6^5.\left(1+6.7\right)}{6^3.\left(1+6^3.4\right)}\)
\(=\frac{6^2.43}{865}=\frac{36.43}{865}\)
\(=\frac{1568}{865}\)
\(\frac{9}{6}.\frac{6}{7}+\frac{9}{6}.\frac{4}{5}\)
\(=\frac{9}{6}\left(\frac{6}{7}+\frac{4}{5}\right)\)
\(=\frac{9}{6}\left(\frac{30}{35}+\frac{28}{35}\right)\)
\(=\frac{3}{2}.\frac{58}{35}\)
\(=\frac{174}{70}\)
\(=\frac{87}{35}\)
\(\frac{15^3.8^2}{5^6.4^4}=\frac{\left(3.5\right)^3.\left(2^3\right)^2}{5^6.\left(2^2\right)^4}=\frac{3^3.5^3.2^6}{5^6.2^8}=\frac{3^3}{5^3.2^2}=\frac{27}{500}\)