Asked by Venkatesh

IN A GP if the sum of 2nd and 4th terms is 30 . The difference of 6th and 2nd term is 90 .
Find the 8 the term

I got r = √13/2
Is it correct?
Pls answer
Answered by Venkatesh
I got the answer
Answered by Steve
ar + ar^3 = 30
ar^5 - ar = 90

I get a=3 and r=2

The GP is
3, 6, 12, 24, 48, 96, 192, 384, ...
T2+T4 = 6+24 = 30
T6-T2 = 96-6 = 90
T8 = 384
Answered by Venki
Yah you are correct
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