Sum of Geometric sequence.
1. find the sum of the first five terms of the geometric series 6, 12, 24
2. find the sum of the first seven terms of a geometric me whose first term is 3 and the common ratio 4 Sn = a₁c²³ first term sequence 1-->>> common ratio
3. find the sum of the terms of the geometric series if a₁ = 1 and v² =2
4. 2, 6, 18, 54, 162​