\(\frac{9^6.16^4}{27^4.8^3}\)
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\(=\frac{\left(2^2\right)^3.3^5-\left(3^2\right)^2.4^3}{\left(2^2\right)^3.9^2-\left(3^2\right)^2.\left(2^3\right)^2}=\frac{4^3.3^5-3^4.4^3}{2^6.9^2-9^2.2^6}=\frac{4^3.\left(3^5-3^4\right)}{9^2.\left(2^6-2^6\right)}=\frac{162}{0}\)
phps tính không hợp lệ vì không tồn taij phân số có mẫu bằng 0
\(\Rightarrow B=\frac{\frac{3}{2}.\left(\frac{1}{6}-\frac{1}{16}+\frac{1}{16}-\frac{1}{26}+\frac{1}{26}-\frac{1}{36}\right)}{\frac{33}{10}.\left(\frac{1}{6}-\frac{1}{16}+\frac{1}{16}-\frac{1}{26}+\frac{1}{26}-\frac{1}{36}\right)}=\frac{\frac{3}{2}}{\frac{33}{10}}=\frac{3}{2}:\frac{33}{10}=\frac{5}{11}\)
\(\frac{\frac{15}{6.16}+\frac{15}{16.26}+\frac{15}{26.36}}{\frac{33}{6.16}-\frac{63}{16.26}-\frac{93}{26.36}}\)
\(=\frac{\frac{15}{10}\cdot\left(\frac{1}{6}-\frac{1}{16}+\frac{1}{16}-\frac{1}{26}+\frac{1}{26}-\frac{1}{36}\right)}{\frac{11}{32}-\frac{63}{416}-\frac{31}{312}}\)
\(=\frac{\frac{15}{10}\cdot\left(\frac{1}{6}-\frac{1}{36}\right)}{\frac{143}{416}-\frac{63}{416}-\frac{124}{\frac{3}{416}}}=\frac{\frac{5}{24}}{\frac{143-63-\frac{124}{3}}{416}}\)
\(=\frac{\frac{5}{24}}{\frac{116}{\frac{3}{416}}}=\frac{\frac{5}{24}}{\frac{29}{312}}=\frac{65}{29}\)
\(\frac{9^6\times16^4}{27^4\times8^3}\)
\(=\frac{(3^2)^6\times(2^4)^4}{(3^3)^4\times(2^3)^3}\)
\(=\frac{3^{12}\times2^{16}}{3^{12}\times2^9}\)
\(=\frac{2^{16}}{2^9}\)
\(=2^7\)
\(=128\)
a) \(\frac{9^6.16^4}{27^4.8^3}=\frac{\left(3^2\right)^6.\left(2^4\right)^4}{\left(3^3\right)^4.\left(2^3\right)^3}=\frac{3^{2.6}.2^{4.4}}{3^{3.4}.2^{3.3}}=\frac{3^{12}.2^{16}}{3^{12}.2^9}=\frac{3^{12}.2^9.2^7}{3^{12}.2^9}=2^7=128\)
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