The sum to the infinity of the series 1 + 23 + 6 3^2 + 10 3^3 + 14 3^4 + is

JEE Main 2009 Mathematics question

The sum to the infinity of the series is

Answer: (2)

After the first term the numerators are 2, 6, 10, 14, … : \sum_{n\ge1}${4n -

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Question ID VK-039174