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JEE Advanced Mathematics question

MathematicsSequence and SeriesJEE Advanced

If are in AP, and are the AM and GM respectively between and , while are the AM and GM respectively between and , then

Answer: (C)

Solution

. Then

-==Missing argument for \frac\frac{(a-c)(a+2b+c)}4.

Since are in AP, , so and

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Question ID VK-107825