Dari barisan dibawah ini, tentukan a, r, dan U6 A. 4,16,64,256,... B. 1/25,1/125,1/625 C. 625,125,25,5,... Bantu jawa si..

Nomer A
a = 4
r = 16/4 = 4
Un = a.r^n-1
U6 = 4.4^6-1
U6 = 4.4^5
U6 = 4.1024
U6 = 4096

Nomer B
a = 1/25
r = 1/125 / 1/25 = 1/5
U6 = 1/25. 1/5^6-1
U6 = 1/25. 1/5^5
U6 = 1/25. 1/3125
U6 = 125

Nomer C
a = 625
r = 125/625 = 1/5
U6 = 625.1/5^6-1
U6 = 625. 1/5^5
U6 = 625. 1/3125
U6 = 1/5