Jawabanmu

2014-03-06T12:18:48+07:00
R = 25/125
r = 1/5

U₈ = ar⁷
U₈ = 125(1/5)⁷
U₈ = 5³(1/5)⁷
U₈ = 1/5⁴
U₈ = 1/625

CMIIW :3
2014-03-06T12:50:36+07:00
Un= a.r^n
=125.1^7
         5
=125.1/390625
=0.00032