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| Math Central | Quandaries & Queries |
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Question from sweta, a student: find the ratio of GP if the first term is 1 and the sum of third and fifth term is 90. |
Sweta,
A geometric progression has a first term wihch is commonly called a and a common ratio commonly designeted r. What makes the progression "geometric" is that after the first term, each term is r times the previous term. Hence the progression is
a, ar, ar2, ar3, ar4, ···
For your progression a = 1.
Can you complete the problem now?
Penny
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