Question
Find the sum of each infinite geometric series that has a sum.$$10-2+0.4-\cdots$$
Step 1
The first term is the first number in the series, which is 10. The common ratio is the ratio between any term and the previous term. In this case, the second term is -2 and the first term is 10, so the common ratio is -2/10 = -1/5. Show more…
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