The general form of the infinite geometric series is a 1 a 1 r a 1 r 2 a 1 r 3 where a 1 is the first term and r is the common ratio. Sn a1 ra1 r2a1 rn1a1 S n a 1 r a 1 r 2 a 1 r n 1 a 1. A What is r for this series.
R a ₂ a ₁ nth term or general term of the arithmetic sequence.
And the 10th term is. A geometric progression is a sequence in which any element after the first is obtained by multiplying the preceding element by a constant called the common ratio which is denoted by r. We can find the sum of all finite geometric series. A Geometric Sequence can also have smaller and smaller values.