5x + 1 = 125
5x + 1 = 53
suy ra : 3 - 1 = 2
Vậy x = 2
\(5^{x+1}=125\)
\(5^{x+1}=5^3\)
\(\Rightarrow x+1=3\)
\(x=3-1\)
\(x=2\)
vậy x=2
k mk nha!
26 x 5^x-1- 5^x-1=125
Tìm x : ( 5^2.x - 5^x+1) :5=125
26.5^x - 1 - 5^x - 1=125
a)42x - 6 = 1
b)2x-1= 16
c)5<5x<125
d)5x+1= 125
e)52x-3 - 2. 52 = 52 . 3
5^x+1=125
Tìm x
a) 5.x^3 - 5 = 0
b) ( x+1)^2 = 16
c) ( x+1)^3 = 27
d) ( x-1)^3 = 343
e) (2x - 1^3) = 125
3^x=234
3^x=4096
6^x=216
5.3^x=405
2^x=4
x^5=32
x^2;8=25
X^4=81
5^x^-1+125
5^x^+3=81
(x-2)^5=243
(x-1)^4=16
(x+1)^3=125
(x-2)^3=64
(x-1)^5=32
5^x+1=125
tìm x
Tìm x : (52.x - 5x+1) :5 = 125
Tìm x,biết:
A) 8 + ( x - 9)= 125 - 64
B) 5×(x+7) -10 = 8×5
C) 7 × 7 - 7( 13 - 2× x) = 14
D) 320 : (x - 1) = ( 125 - 5 ×5 ) : 4 + 15
E) 240 : ( x -5 ) = 4 × 5 ×5 - 60 : 3
F) 49 × x - 14 × x = 49 × 10 - 70
