5^25.5^x-1=5^25
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525.5:525-|125|
=(525:525).5-|125|
= 1.5 - 125
=5-125
=-120
![](https://rs.olm.vn/images/avt/0.png?1311)
5^50.5+125=5^50.5+5^3=5^50.5+5^2.5=5.[5^50+5^2]
Rồi tự làm tiếp nha bạn
Bổ sung bài : Tính
\(5^{25}.5.5^{25}+\left|-125\right|\)
\(=5^{51}+125\)
Kết quả chỉ dừng ở đó vì không thể tính ra con số cụ thể được nữa.
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\(20\%\times25,5+\dfrac{1}{5}\times15,5+0,2\times59\)
\(=\dfrac{1}{5}\times25,5+\dfrac{1}{5}\times15,5+\dfrac{1}{5}\times59\)
\(=\dfrac{1}{5}\times\left(25,5+15,5+59\right)\)
\(=\dfrac{1}{5}\times100\)
\(=20\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(x-1\frac{4}{5}=\frac{10}{5}\)
\(\Rightarrow x=2+1\frac{4}{5}=3\frac{4}{5}=\frac{19}{5}\)
b) \(5,85:x=26-25,5\)
\(\Leftrightarrow5,85:x=0,5\)
\(\Rightarrow x=5,85:0,5=11,7\)
c) \(151-\left(-2\right).\left(x-6\right)=2227:17=131\)
\(\Rightarrow\left(-2\right).\left(x-6\right)=151-131=20\)
\(\Rightarrow\left(x-6\right)=20:\left(-2\right)=-10\)
\(\Rightarrow x=-4\)
d) \(\frac{2}{3}-\frac{1}{3}x=\frac{1}{4}\)
\(\Rightarrow \frac{1}{3}x=\frac{2}{3}-\frac{1}{4}=\frac{5}{12}\)
\(\Rightarrow x=\frac{5}{12}:\frac{1}{3}=\frac{5}{4}\)
dấu chấm (.) là dấu nhân nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(\frac{25.5^3.1}{25.5^2}=\frac{5^2.5^3.1}{5^2.5^2}=\frac{5^5}{5^4}=5\)
b, \(5^2.3^5.\left(\frac{3}{5}\right)^2=5^2.3^5.\frac{9}{25}=5^2.\frac{9}{25}.3^5=9.3^5=3^2.3^5=3^7\)
c, \(\left(\frac{1}{7}\right)^2\cdot\frac{1}{7}\cdot\frac{49}{2}=\frac{1}{49}\cdot\frac{1}{7}\cdot\frac{49}{2}=\frac{1}{49}\cdot\frac{49}{2}\cdot\frac{1}{7}=\frac{1}{2}\cdot\frac{1}{7}=\frac{1}{14}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(5 mũ 2)mũ 3 : 5 mũ 2
5 mũ 2 x3 :5 mũ 2
5 mũ 6 : 5 mũ 2 =5 mũ 4=625
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\Leftrightarrow5^x\left(5^{-2}.5^2\right)=5^4.5^5\)
\(\Leftrightarrow5^x.1=5^9\Rightarrow5^x=5^9=1953125\)
\(\)
525.5x-1=525
5x-1=525:525
5x-1= 50
=>x-1=0
x=0+1
x=1
vậy x=1