Question

Of a G.P series the first two terms are 3 and 1, find 7th term​

Answer 1

We know the formula,

tn=ar^n−1

We need to find 7th term i.e. n=7

Common ratio =1/3

a=3

Thus

t7= 3×(1/3)^7-1

t7= 3×(1/3)^6

t7= 3/729

t7= 1/243