a,
(-3)^4.(-3)^5=(-3)^9
(-3)^12:(-3)^3=(-3)^9
=>bằng nhau
b,(1/5)^2.(1/5)^6=(1/5)^8
{(1/5)^2}^4=(1/5)^8
=>bằng nhau
c,
(0,25)^8:(0,25)^2=(0,25)^6
((0,25)^2)^3=(0,25)^6
=>bằng nhau
d,(-2/3)^5:(-2/3)^3=(-2/3)^2
(-2/3)^2
=> bằng nhau

a) 3^6 . x = 3^8
             x = 3^8 : 3^6 = 3^2
b) (3/4)^7 : x = (3/4)^6
                  x = (3/4)^7 : (3/4)^6 = 3/4
c) x^4 = 625
    x^4 = 5^4  hoặc  x^4 = (-5)^4
    x = 5  hoặc  x = -5
d) (x + 1)^3 = 8
    (x + 1)^3 = 2^3
    x + 1 = 2
          x = 1
e) 2^6 : x = (-2)^4
             x = 2^6 : 2^4 = 2^2
f) 3^5 . x = (-3)^7
            x = (-3)^7 : 3^5 = (-3)^2

a)(-3)^4.(-3)^5=(-3)^9
b)(1/5)^2.(1/5)^6=(1/5)^8=[(1/5)^2]^4