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\(25^6\). \(5^{10}\)= \(5^{12}\). \(5^{10}\)= \(5^{12+10}\)= \(5^{22}\)
\(8^4\). \(16^3\). \(32\)= \(2^{3.4}\). \(2^{3.4}\). \(2^5\)= \(2^{12}\). \(2^{12}\). \(2^5\)= \(2^{12+12+5}\)= \(2^{29}\)
\(27^4\). \(81^{10}\)= \(3^{12}\). \(3^{40}\)= \(3^{12+40}\)= \(3^{52}\)
Chúc bạn học tốt nhé !
a: \(=-25\cdot4-27=-100-27=-127\)
b: \(=-65:\left(-13\right)-25\cdot4=5-100=-95\)
c: \(=100\cdot\left(-47\right)+53\cdot\left(-100\right)=100\cdot\left(-100\right)=-10000\)
d: \(=\left[\left(-3\right)^{13}:3^{10}-73\right]:\left(-5\right)^2-14\)
\(=\left(-100\right):25-14=-4-14=-18\)
a) \(n^{51}=n\)
\(\Rightarrow n^{51}-n=0\)
\(n\left(n^{50}-1\right)=0\)
\(\Rightarrow\orbr{\begin{cases}n=0\\n^{50}-1=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}n=0\\n^{50}=1\end{cases}}\)
\(\Rightarrow n\in\left\{-1;0;1\right\}\)
b) \(\frac{1}{9}.27^n=3^n\)
\(\Rightarrow3^{-2}.3^{3n}=3^n\)
\(3^{3n-2}=3^n\)
\(\Rightarrow3n-2=n\)
\(3n-n=2\)
\(2n=2\)
\(n=2:2=1\)
c) \(3^{-2}.3^4.3^n=3^7\)
\(3^{n+4-2}=3^7\)
\(3^{n+2}=3^7\)
\(\Rightarrow n+2=7\)
\(\Rightarrow n-7=5\)
d) \(32^{-n}.16^n=2048\)
\(2^{-5n}.2^{4n}=2^{10}\)
\(2^{4n-5n}=2^{10}\)
\(2^{-n}=2^{10}\)
\(\Rightarrow-n=10\)
\(\Rightarrow n=-10\)
\(\dfrac{14^{16}}{21^{32}}.\dfrac{35^{48}}{10^{16}}.\dfrac{15^{32}}{7^{96}}\)=\(\dfrac{\left(2.7\right)^{16}.\left(5.7\right)^{48}.\left(3.5\right)^{32}}{\left(3.7\right)^{32}.\left(2.5\right)^{16}.7^{96}}\)=\(\dfrac{2^{16}.7^{16}.5^{48}.7^{48}.3^{32}.5^{32}}{3^{32}.7^{32}.2^{16}.5^{16}.7^{96}}\)
=\(\dfrac{2^{16}.3^{32}.5^{80}.7^{64}}{2^{16}.3^{32}.5^{16}.7^{128}}=\dfrac{5^{64}}{7^{64}}\)
9652:3251-3251:2250
(3.32)52:3251-(25)51:2250
=352.3252:3251-2255:2250
=352.(3252:3251)-2255-250
=352.3252-51-25
=352.32-32
=32.(352-1)