Question

Tolong donk nomor 2 dijawab. penting

Answer 1

U3 = a. r^(3-1)= a.r^2
U5 = a . r^(5-1) = a.r^4

18 = a. r^2
162 = a . r^4
----------------- ÷
18/162 = r^-2
r^2 = 162/18
r^2 = 18/2 = 9
r = 3

18 = a. 3^2
18 = a . 9
a = 2

U10 = a.r^(10-1)
U10 = 2. 3^9
Jawaban:
a. 2
b. 3
c.  2 * 3^9