Question

What is the value of r of the geometric series?

Answer 1

`r =0.8`

Explanation:

`\text{By Comparing}~ 1.3(0.8)^(n-1)~ \text{with the nth term}~ ar^(n-1),\\\\\text{First term,}~a= 1.3\\\\\text{Common ratio,}~ r = 0.8`

Answer 2

Answer: The common ratio, r, is found by dividing any term after the first term by the term that directly precedes it. In the following examples, the common ratio is found by dividing the second term by the first term, a2 / a1 . When the common ratio of a geometric sequence is negative, the signs of the terms alternate.

Explanation: