Q. Find the sum of the infinite geometric series.−8−38−98−278+Write your answer as an integer or a fraction in simplest form.______
Identify Terms and Ratio: To find the sum of an infinite geometric series, we need to identify the first term a and the common ratio r of the series. The formula for the sum of an infinite geometric series is S=1−ra, where |r| < 1. In the given series, the first term is −8 and each subsequent term is obtained by multiplying the previous term by 31. Therefore, the common ratio r is 31.
Apply Sum Formula: We can now apply the formula for the sum of an infinite geometric series: S=1−ra. Substituting the values we have, S=1−31−8.
Substitute Values: Now we perform the calculation: S=(−8)/(1−1/3)=(−8)/(2/3)=(−8)×(3/2)=−24/2=−12.
Perform Calculation: We have found the sum of the series, which is −12. This is an integer, and it is already in its simplest form.
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