Asked by Toby

The fifth term of an exponential sequence is greater than the fourth term by 13.5 and the fourth term is greater than the third term by 9. Find the
1. Common ratio
2. First term
Answered by oobleck
Just use your GP formulae:
ar^4 = ar^3 + 13.5
ar^3 = ar^2 + 9
Now just solve for a and r
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