tính (0,8)^5/(0,4)^6
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\dfrac{0,8^5}{0,4^6}=\dfrac{\left(2^3\cdot\dfrac{1}{10}\right)^5}{\left(2^2\cdot\dfrac{1}{10}\right)^6}=\dfrac{2^{15}\cdot\dfrac{1}{10^5}}{2^{12}\cdot\dfrac{1}{10^6}}=\dfrac{2^3}{\dfrac{1}{10}}=2^3\cdot10=80\)
\(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}=\frac{\left(0,8\right)^5}{\left(0,4\right)^5}\times\frac{1}{0,4}=\left(\frac{0,8}{0,4}\right)^5\times\frac{5}{2}=2^5\times\frac{5}{2}=2^4\times5=16\times5=80\)
bạn ơi , tại sao \(\frac{0,8^5}{0,4^6}\)bằng \(\frac{0,8^5}{0,4^5}\)vậy ?
\(=\left(\dfrac{0,8}{0,4}\right)^5\cdot\dfrac{1}{0,4}=2^5\cdot\dfrac{1}{0,4}=\dfrac{32}{0,4}=80\)
Giải:
\(\dfrac{\left(0,8\right)^5}{\left(0,4\right)^6}\)
= \(\left(\dfrac{0,8}{0,4}\right)^5.\dfrac{1}{0,4}\)
= \(2^5.\dfrac{1}{0,4}\)
= \(\dfrac{32}{0,4}=80\)
Hok tốt
(0,8)⁵ : (0,4)⁶
= (4/5)⁵ : (2/5)⁶
= 1024/3125 : 64/15625
= 16 . 5
= 80
\(\left(0,8\right)^5:\left(0,4\right)^6\\ =\left(\dfrac{4}{5}\right)^5:\left(\dfrac{2}{5}\right)^6\\ =\dfrac{1024}{3125}:\dfrac{64}{15625}\\ =16.5\\ =80\)
(0,8)\(^5\) : (0,4)\(^6\) = ((0,2)\(^3\))\(^5\) : ((0,2)\(^2\))\(^6\) = (0,2)\(^{15}\) : (0,2)\(^{12}\) = (0,2)\(^3\) = 0,8
\(\left(0,8\right)^5:\left(0,4\right)^6=\left(\dfrac{4}{5}\right)^5.\left(\dfrac{5}{2}\right)^6=\dfrac{2^8}{5^5}.\dfrac{5^6}{2^6}=\dfrac{4}{1}.\dfrac{5}{1}=20\)
=\(\left[\dfrac{\left(0,4.2\right)^5}{\left(0,4\right)^6}+\dfrac{2^9.2^6.3^8}{\left(3.2\right)^6.2^9}\right]=\left[\dfrac{\left(0,4\right)^5.2^5}{\left(0,4\right)^6}+\dfrac{2^6.3^8}{3^6.2^6}\right]\)
=\(\left[\dfrac{2^5}{0,4}+3^2\right]\)
=\(\left[80+9\right]=89\)
\(\left[\dfrac{\left(2.0,4\right)^5}{0,4,0,4^5}+\dfrac{2^{15}.3^8}{3^6.2^6.2^9}\right]\div\dfrac{3^{20}.5^{30}}{3^{15}.5^{30}}\)
\(=\left[\dfrac{2^5.0.4^5}{0,4.0,4^5}+\dfrac{2^{15}.3^8}{3^6.2^{15}}\right]\div3^5\)
\(=\left[\dfrac{2^5}{0,4}+3^2\right]\div243\)
\(=80+\left(3^5\div3^2\right)\)
\(=80+3^3\)
\(=80+27\)
\(=107\)
\(\frac{\left(0,8^5\right)}{\left(0,4^6\right)}=80\)
nha bạn
Linh Nguyễntrao đổi k ko bạn ?\(\frac{\left(0,8^5\right)}{\left(0,4^6\right)}=80\)nha Linh Nguyễn ^_^
\(\frac{\left(0,8\right)^5}{\left(0,4\right)^6}=\frac{\left(0,4.2\right)^5}{\left(0,4\right)^6}=\frac{\left(0,4\right)^5.2^5}{\left(0,4\right)^6}=\frac{2^5}{0,4}=\frac{32}{0,4}=80\)
\(\dfrac{\left(0,8\right)^5}{\left(0,4\right)^6}=\dfrac{\left(0,4.2\right)^5}{\left(0,4\right)^6}=\dfrac{\left(0,4\right)^5.2^5}{\left(0,4\right)^6}=\dfrac{2^5}{0,4}=\dfrac{32}{0,4}=80\)