Q. Find the sum of the infinite geometric series.−10−25−85−325+Write your answer as an integer or a fraction in simplest form.______
Identify Terms: First, we need to identify the first term a and the common ratio r of the geometric series.The first term a is −10.To find the common ratio r, we divide the second term by the first term: r=−10−5/2=41.
Calculate Common Ratio: Now that we have the first term and the common ratio, we can use the formula for the sum of an infinite geometric series, which is S=(1−r)a, provided that |r| < 1. In this case, |\frac{1}{4}| < 1, so we can use the formula.
Use Sum Formula: Let's plug the values into the formula:S=1−41−10S=43−10S=−10×34
Plug in Values: Now, we perform the multiplication to find the sum:S=−340This is the sum of the infinite geometric series in fraction form.
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