Question

What is the value of r of the geometric series n=11.3(0.8)n-1

Answer 1

the value of r of the geometric series n=11.3(0.8)n-1

`an=11.3(0.8)^(n-1)`

General formula for nth term of any geometric series is
`a_n=a_1(r)^(n-1)`

Here 'r' is the common ratio

a_1 is the first term of the series

Now we compare the given formula with general formula

Compare
`an=11.3(0.8)^(n-1)` with
`a_n=a_1(r)^(n-1)`

The value of r= 0.8