Question
For Exercises $7-12,$ determine the common ratio, $r,$ for the geometric sequence.$$5,10,20,40, \dots$$
Step 1
This is done by dividing the second term by the first term. In this case, we have $a_1 = 5$ and $a_2 = 10$. So, the ratio $r$ is given by $r = \frac{a_2}{a_1} = \frac{10}{5} = 2$. Show more…
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