How do I find the sum of this series? summation of (n+1)/3^n when I used the first few n's I didn't see a pattern.
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Originally Posted by Nichelle14 How do I find the sum of this series? summation of (n+1)/3^n when I used the first few n's I didn't see a pattern. It is the combination of arithmetic and geometric series. Let Find 3S Find 3S-S KeepSmiling Malay
Can you explain a little more? Still lost
Hello, Nichelle14! How do I find the sum of this series? . We are given: . . Multiply by Subtract: . . . . After the first term, we have a geometric series with first term . . common ratio , and whose sum is: Hence, we have: . Therefore: .
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