3^ x . 3^ 2= 729
3^ x . 9 = 729
3^ x = 729: 9
3^x =81
vậy x = 3^3
5^ x . 625 = 3125
5^x = 3125:625
5^x = 5
vậy x = 1
( 2x+1 )^ 3 = 27
( 2x+1) ^ 3 = 3^3
vậy 2x+1 = 3
vậy x = 0
tìm x thuộc N biết:
a) 3 x : 3 = 81
b) x : 45 = 4
c) 3x . 32 = 729
d) 5x .625 = 3125
e) (2x + 1)3 = 729
g) x 1000= x2
h) (x-2)3= (x-2)2
Tìm x biết:
a,(2x+3/5)^2-9/25=0
b,(3x-1).(-1/2x+5)=0
c, (7/5)^x+1-(1/5)^x=-4/625
d,(2/3)^x+2+(2/3)^x+1=20/27
Tìm x:
5 lũy thừa 3 nhân 625 = 3125
bài 1: tìm số nguyên x, biết
a) \(\left(25-2x\right)^3\): 5 - \(3^2\)= \(4^2\) b) 2 x \(3^x\)= \(10\) x \(3^{12}\) + 8 x \(27^4\)
tìm x
\(\dfrac{3-x}{5-x}=\dfrac{6}{11}\) \(\left(1\dfrac{1}{3}-25\%.x-\dfrac{5}{12}\right)-2x=1,6:\dfrac{3}{5}\)
\(\dfrac{1}{2}.\left(x-\dfrac{2}{3}\right)-\dfrac{1}{3}.\left(2x-3\right)=x\)
\(2.\left(\dfrac{1}{2}-x\right)-3\left(x-\dfrac{1}{3}\right)=\dfrac{7}{2}\)
giúp mình với
9[3mu x[243
25[5 mũ x[625
9[3 mũ n[27
25[5mu h[3125
Tìm x, biết:
a) \(\left(3\dfrac{1}{2}+2x\right).2\dfrac{2}{3}=5\dfrac{1}{3}\)
b) \(\left(2x+3\right)=5\)
c) \(\dfrac{x-2}{4}=\dfrac{5+x}{3}\)
tìm x
a)5^2x . 5 = 3125
b)5^x 5^x+3 =630
c)3^2x + 1 = 243
d) 3^2x+1 = 9
Tìm x
a) 5^2x . 5 =3125
b)5^x + 5^x+3= 630
c)3^2x+1=243
d)3^2x+1=9
