SOLUTION: Please help me solve this question, the 2nd term of an exponential sequence is 9 while the 4th term is 81. Find the common ratio,the 1st term and the sum of the 1st five terms

Algebra ->  Sequences-and-series -> SOLUTION: Please help me solve this question, the 2nd term of an exponential sequence is 9 while the 4th term is 81. Find the common ratio,the 1st term and the sum of the 1st five terms      Log On