suku ke2 dan suku ke6 barisan geometri berturut adalah 10 dan 160. suku ke10 barisan tersebut?

Un = ar^n-1

U6 = ar^5 = 160
U2 = ar = 10
_____________ :
r^4 = 16
r = 4V16
r = 2

ar = 10
a.2 = 10
a = 10/2
a = 5

U10 = ar^10-1
U10 = 5.2^9
U10 = 5.512
U10 = 2560

Semoga membantu dan semoga bermanfaat...

r^6-2 = 160/10
r^4 = 16
r = ⁴√16
r = 2

U2 = ar^2-1
10 = a . 2
a = 10/2
a = 5

maka;
U10 = ar^10-1
= 5 . 2^9
= 5 . 512
= 2560