Problem

Find the sum of the infinite geometric series. \[ 1+\frac{1}{5}+\frac{1}{25}+\frac{1}{125}+\cdots \] Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The sum of the series is $S=\square$. (Type an integer or a simplified fraction.) B. The series does not have a sum.

Solution

Step 1 :This is a geometric series with first term a = 1 and common ratio r = 1/5.

Step 2 :The sum of an infinite geometric series can be found using the formula \(S = \frac{a}{1 - r}\), where S is the sum of the series, a is the first term, and r is the common ratio.

Step 3 :In this case, a = 1 and r = 1/5, so we can substitute these values into the formula to find the sum of the series.

Step 4 :\(S = \frac{1}{1 - \frac{1}{5}}\)

Step 5 :\(S = \frac{5}{4}\)

Step 6 :Final Answer: The sum of the series is \(\boxed{\frac{5}{4}}\)

From Solvely APP
Source: https://solvelyapp.com/problems/b3e9xovD7X/

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