User talk:Tanshen Barua

Answer The Question
The First term of a geometric series is 'a' common ratio is 'r', the 4th term of the series is - 2 and 9th term of the series is 8Rode2. (a).Express the above information in by two algebraic equations. (b) Find the 12th term of the series. (c) Find The series and sum of first eleven terms of the series.