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JEE Advanced Mathematics question

MathematicsSequence and SeriesJEE Advanced

If , 1 and are in GP then is equal to

Answer: (B)

Solution

GP condition: . With :

-s+1=0\ ⇒\ (s+-2s+1)=0 .

has discriminant , so , i.e. . Then the terms are (ratio ), a genuine GP.

Now che

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Question ID VK-108540