Hitunglah Jumlah Deret geometri tersebut : a. 1/2 + 2 + 8 ..... sampai 15 suku

Langsung aja y

r = (U2 : U1)
r = (2 : ½)
r = 2 × 2
r = 4

S15 = U1 (1-r¹⁴) / (1-r)
S15 = ½ (1-4¹⁴) / (1-4)
S15 = ½ (-2.68435 × 10^8) / (-3)
S15 = ½ × 89.478.585
S15 = 44.739.242,5

Semoga berguna +_+