Question

Find the sum of the finite geometric sequence whose first term is 1.4, whose ratio is 0.5, and which has six terms.

The sum is
(Type an integer or decimal rounded to five decimal places as needed.)

Answer 1

2.75632 rounded to 5 decimal places

Explanation:

a(r^n-1)/r-1 is the formula for sum of geometric series

where a= first term (1.4)

n= number of terms(6)

r= common ratio(0.5)