If 2, (2^x-1 ) and (2^x+3 ) are in A.P., then 2,2^x-1,2^x+3 are in

JEE Main Mathematics question

If and are in A.P., then are in

Answer: (C)

Three numbers whose logarithms are in AP are in GP (the middle term squared equals the product of the outer terms). Indeed

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Question ID VK-021908