5^x+1 = 125
5^x+1 = 5³
⇒ x + 1 = 3
    x = 3 - 1

    x = 2

Vậy x = 2

5^x+1=125

=>5^x. 5=5³

=>5^x=5²

=>x=2

Lời giải:

$5^{x+1}=125=5^3$

$x+1=3$

$x=2$

a) x = 4

b) x = 5

c) x = 2

d) x = 2

e, x = 1

f, x = 0 hoặc  x = 1

a) x = 4                

b) x = 5     

c) x = 2                

d) x = 2

e) x = 1                

f) x = 0 hoặc  x = 1.

\(5x-2.\left(x-1\right)=4.3.125.\left(-25\right).8\)

       \(5x-2x+2=-300000\)

                  \(3x+2=-300000\)

                          \(3x=-300000-2\)

                          \(3x=-300002\)

                             \(x=-\frac{300002}{3}\)

a .   3 x = 9   ⇔ 3 x = 3 2 ⇔ x   =   2

b .   5 x = 5 3 ⇔ x = 3

c . 3 x + 1 = 3 2 ⇔ x + 1 = 2 ⇔ x = 1

a) Ta có: 3 x = 3 2  nên x = 2.

b) Ta có: 5 x = 5 3  nên x = 3.

c) Ta có:  3 x + 1   =   3 2 nên x +1 = 2, do đó x = 1.

\(\Leftrightarrow5x=40\\ \Leftrightarrow x=8\)

x=8

Ai giúp mình với ạ

\(125:5^x+5^2=26\)

\(\Rightarrow125:5^x+25=26\)

\(\Rightarrow125:5^x=26-25\)

\(\Rightarrow125:5^x=1\)

\(\Rightarrow5^x=125:1\)

\(\Rightarrow5^x=125\)

\(\Rightarrow5^x=5^3\)

\(\Rightarrow x=3\)

\(\left(1,25-\dfrac{4}{5}x\right)^3=-125\)

\(=>1,25-\dfrac{4}{5}x=-5\)

\(x=\left(1,25+5\right):\dfrac{4}{5}=6,25:\dfrac{4}{5}=\dfrac{125}{16}\)

Cậu thử tham khảo ạ

https://hoctap.coccoc.com/toan?query=(1.25-4%2F5x)%5E3%3D-125

Ta có : 125 : 5^x = 5 

 => 5^x = 125 : 5 => 5^x = 25

 => 5^x = 5² => x = 2

Ta có : 125 : 5x = 5 

 => 5x = 125 : 5 => 5x = 25

 => 5x = 52 => x = 2