dik barisan geometri dengan suku ke-4 24 dan rasio 2. suku pertama barisan ke 10 adalah

Dik :
→ U4 = ar^3 = 24
→ r = 2

ar^3 = 24
a (2)^3 = 24
a = 24 / 8
a = 3

U10 = ar^9
U10 = ( 3 ) ( 2 )^9
U10 = ( 3 ) ( 512 )
U10 = 1536

S10 = a (r^10 - 1) / (r - 1)
S10 = 3 (2^10 - 1) / (2 - 1)
S10 = 3 (1024 - 1)
S10 = 3 (1023)
S10 = 3069