Question

Suku ke-9 dari barisan tsb adalah....
yg blm tdur,tlng jwb yaaa

Answer 1

U2 = 16, U5 = 2
cari rasio =
r^5-2 = 2/16
r^3 = 1/8
r = 1/2

U2 = ar^n-1
16 = a x (1/2)^2-1
16 = a x (1/2)^1
16 = a x 1/2
a = 16 x 2 = 32

U9 = ar^n-1 = 32 x (1/2)^9-1 = 2^5 x (1/2)^8 = 2^5 x 1/(2^8) = 1/(2^3) = 1/8

Answer 2

Maaf kalau salahhhhhhh