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JEE Main Mathematics question

MathematicsSequence and SeriesJEE Main

Let the sum of an infinite G.P., whose first term is and the common ratio is , be . Let the sum of its first five terms be . Then the sum of the first terms of an AP, whose first term is , term is and the common difference is , is equal to

Answer: (A)

Solution

For the AP with first term and common difference , the term is , and the terms are symmetric about it. The sum of

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Question ID VK-022167