The geometric progression can be written as. B n 1 left -2right n - 1 bn 12n1. Sequence and Series.
4 0 1 0 0 2 5.
Each term is multiplied by 2 to get the next term. The sum S of an infinite geometric series with 1 r 1 is given by the formula S a 1 1 r. You can use sigma notation to represent an infinite series. Similarly the 1st term of a geometric sequence is in general independent of the common ratio.