Help!! Geometric progression
posted by Collins .
Question(1):A G.P has a common ratio of 2 find the value of 'n' for which the sum 2n terms is 33 times the sum of n??
Question(2):in A G.P the product of the 2nd and the 4thterm is double ,the 5th term and the sum of the first 4 term is 80.find the G.P??
Help!! Geometric progression -
r=2, so you want
a(2^(2n)-1) = 33a(2^n-1)
ar * ar^3 = 2ar^4
a(r^4-1)/(r-1) = 80
Help!!! Geometric progression -
When the 8th term of a G.P is divided by the 3rd term, the result is 32 and the 11th term Of the sequence is 4096. Find the c'mon ratio, the first term and the sequence..