SOLUTION: The common ratio of a G.P is 2. If the 5th term is greater than the 1th term by 45, find the 5th term

Algebra ->  Sequences-and-series -> SOLUTION: The common ratio of a G.P is 2. If the 5th term is greater than the 1th term by 45, find the 5th term      Log On


   

Question 985102: The common ratio of a G.P is 2. If the 5th term is greater than the 1th term by 45, find the 5th term
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
a, 2*a, 2*2*a, 2*2*2*a, 2*2*2*2*a

%282%5E4%29a-a=45, or the fifth term is greater than the first term by 45.
16a-a=45
15a=45
15a%281%2F15%29=45%281%2F15%29