Tentukan suku pertama,ke 6,ke 10 ..pada barisan 4,2,1,1/2,1/4

U1=a = 4
r = 2/4 = 1/2

U6 = ar^5
= 4•(1/2)^5
= 4• 1/32
= 1/8

U10 = ar^9
= ar^9
= 4•(1/2)^9
= 4•(1/512)
=1/128