Jawaban:
DeRgeo =
ar² = 18
a = 2
2r² = 18
r² = 9
r = 3
Sn = a(rⁿ - 1)/r-1
S5 = 2(3^5 - 1)/2
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Jawaban:
DeRgeo =
ar² = 18
a = 2
2r² = 18
r² = 9
r = 3
Sn = a(rⁿ - 1)/r-1
S5 = 2(3^5 - 1)/2
S5 = 242