Diketahui barisan geometri 2, 4, 8, 16, 32,... Tentukan jumlah 10 suku pertamanya!!!

r = 4/2
   = 2
Sn = a (rⁿ - 1) / (r - 1)
S10 = 2 (2¹⁰ - 1) / (2 - 1)
S10 = 2 (1024 - 1) / 1
        = 2 . 1023
        = 2046