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Question

If the 5th term of a G.P. containing positive terms is 13 and 9th term is 16243, then the 4th term will be


A

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B

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C

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D

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Solution

The correct option is B


T5 = ar4 = 13 .......(i)

and T9 = ar8 = 16243 .......(ii)

Solving (i) and (ii), we get r = 23 and a = 2716

Now 4th term = ar3 = 3324.2333 = 12


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