Q. Find the sum of the infinite geometric series.−10−215−845−32135+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=−10−15/2=43
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{3}{4}| < 1, so we can use the formula.
Use Sum Formula: Let's calculate the sum using the formula:S=1−ra=1−43−10
Simplify Denominator: Simplify the denominator: 1−43=41
Divide First Term: Now, divide the first term by the simplified denominator:S=−(41)10=−10×(14)=−40
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