Tolong beserta caranya maaf tulisannya jelek kwkwk

Rumus barisan geometri: ar^(n-1)

u4 = 16
ar^3 = 16

u6 = 64
ar^5 = 16

ar^5 / ar^3 = 64 / 16
r^2 = 4
r = 2

ar^3 = 16
a x 2^3 = 16
8a = 16
a = 2

u10 = ar^(n-1)
= 2 x 2^9
= 2 x 512
= 1024