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Ta có :\(\frac{2^7.9^2}{3^3.2^5}=\frac{2^7.\left(3^2\right)^2}{3^3.2^5}\)
\(=\frac{2^7.3^4}{3^3.2^5}=\frac{2^2.3}{1}=12\)
Trả lời:
\(\frac{2^7.9^2}{3^3.2^5}=\frac{2^2.\left(3^2\right)^2}{3^3}=\frac{2^2.3^4}{3^3}=\frac{2^2.3}{1}=4.3=12\)
Học tốt
\(\frac{2^7.9^2}{3^3.2^5}=\frac{2^7.3^4}{3^3.2^5}=\frac{2^2.3}{1.1}=12\)
\(\dfrac{2^7.9^2}{3^3.2^5}\)
\(=\dfrac{2^7.\left(3^2\right)^2}{3^3.2^5}\)
\(=\dfrac{2^7.3^4}{3^3.2^5}\)
\(=2^2.3\)
\(=4.3\)
\(=12\)
\(\dfrac{2^7.9^2}{3^3.2^5}=\dfrac{2^7.\left(3^2\right)^2}{3^3.2^5}=\dfrac{2^7.3^4}{3^3.2^5}=\dfrac{2^2.3}{1}=4.3=12\)
\(a)\) \(A=\frac{1}{199}-\frac{1}{199.198}-\frac{1}{198.197}-\frac{1}{197.196}-...-\frac{1}{3.2}-\frac{1}{2.1}\)
\(A=\frac{1}{199}-\left(\frac{1}{1.2}+\frac{1}{2.3}+...+\frac{1}{197.198}+\frac{1}{198.199}\right)\)
\(A=\frac{1}{199}-\left(\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+...+\frac{1}{197}-\frac{1}{198}+\frac{1}{198}-\frac{1}{199}\right)\)
\(A=\frac{1}{199}-\left(1-\frac{1}{199}\right)\)
\(A=\frac{1}{199}-1+\frac{1}{199}\)
\(A=\frac{-197}{199}\)
Chúc bạn học tốt ~
\(1;a,\left(-\frac{1}{7}\right)^0-2\frac{4}{9}.\left(\frac{2}{3}\right)^2\) \(b,\frac{2^7.9^2}{3^3.2^5}=\frac{2^5.2^2.3^3.3}{3^3.2^5}=2^2.3=12\)
\(=1-\frac{22}{9}.\frac{4}{9}\)
\(=\frac{81}{81}-\frac{88}{81}=\frac{-7}{81}\)
\(a,\left(-\frac{1}{7}\right)^0-2\frac{4}{9}.\left(\frac{2}{3}\right)^2\)
\(=1-\frac{22}{9}.\frac{4}{9}\)
\(=1-\frac{88}{81}\)
\(=-\frac{7}{81}\)
\(b,\frac{2^7.9^2}{3^3.2^5}\)
\(=\frac{2^7.3^4}{3^3.2^5}\)
\(=2^2.3\)
\(=4.3\)
\(=12\)
\(\left|x-\frac{1}{3}\right|+\frac{4}{5}=\left(-3,2\right)+\frac{2}{5}\)
\(\Rightarrow\left|x-\frac{1}{3}\right|+\frac{4}{5}=\frac{-14}{5}\)
\(\Rightarrow\left|x-\frac{1}{3}\right|=\frac{-14}{5}-\frac{4}{5}\)
\(\Rightarrow\left|x-\frac{1}{3}\right|=\frac{-18}{5}\)
Vì giá trị tuyệt đối không thể là một số âm
\(\Rightarrow x\in\varnothing\)
\(\left(x-\frac{1}{3}\right)+\frac{4}{5}=\left[\left(-3.2\right)+\frac{2}{5}\right]\)
\(\left(x-\frac{1}{3}\right)+\frac{4}{5}=\left(-6+\frac{2}{5}\right)\)
\(\left(x-\frac{1}{3}\right)+\frac{4}{5}=-\frac{28}{5}\)
\(x-\frac{1}{3}=-\frac{28}{5}+\frac{4}{5}\)
\(x-\frac{1}{3}=-\frac{24}{5}\)
\(x=-\frac{24}{5}+\frac{1}{3}\)
\(x=-\frac{67}{15}\)
đúng thì k tớ nha bn
\(\frac{2^7.9^2}{3^3.2^5}=\frac{2^7.\left(3^2\right)^2}{3^3.2^5}=\frac{2^7.3^4}{3^3.2^5}=2^2.3=12\)
Có gì sai sót thì bỏ qua nhé chị !
Ta có : \(\frac{2^7.9^2}{3^3.2^5}=\frac{2^5.2^2.81}{27.2^5}=\frac{2^5.2^2.27.3}{27.2^5}=2^2.3=12\)
Vậy \(\frac{2^7.9^2}{3^3.2^5}=12\)