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
3 answers
I got the answer
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
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
Yah you are correct