Question

Find the infinite G.P whose first term is 28and fourth term is 4/49

Answer 1

please refer to the attachment....
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Answer 2

Thank you so much for asking this question. Here is your answer:

Let the GP be a,ar,ar2,ar3,ar4,ar5,ar6....

Given a =28

ar3 =4/49

So r = 1/7

The sum of infinite GP would be:

a/(1-r)=28/(1-1/7)=196/6

196/6 is the final answer.

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