Răspuns:
a) (2/3)^n=16/81=(2/3)⁴
n=4
c)(1si1/2)^n=3si375/1000
(3/2)^n=3375/1000=3375:5/1000:5=
675:5/200:5=135:5/40:5=27/8=(3/2)³
n=3
b)(1/7)^n=1/343=(1/7)³
n=3
d)(2si1/2)^n=125/8
(5/2)^n=(5/2)³
n=3
e) (1/9)^n=1/729=(1/9)³
n=3
f)(1/8)^n=(1/4)³
[(1/2)³]^n=(1/2)⁶
3n=6
n=2
