Question

Geomatic sequance for this question

Answer 1

a = 2

Explanation:

Geometric series:

r = 3

n = 6

`S_n=728`

`\boxed{\bf S_n = (a(r^n - 1))/(r- 1)}`

`(a*(3^6 - 1))/(3-1)=728\\\\ (a * (729 -1))/(2)= 728\\\\ (a * 728)/(2) = 728`

`a = 728 * (2)/(728)\\\\a = 2`