Question

4th term in gp is 1/27 and 7th term is 1/729. find sum of nth terms.

Answer 1

The sequence is 1, 1/3, 1/9 ...
common ratio.,r = 1/3
a, first term = 1
Therefore, The sum is
$( \frac{3}{2} ) \times (1 - {( \frac{1}{3})}^{n} )$