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if log a , log b , log c are in arithmetic progression then find the geometric mean of a and c.

The sum of the first four terms of an arithmetic progression is 56 and sum of the first eight terms of the same A.P. is 176.find the sum of the first 16 terms of the A.P.

The sum of three numbers in a G.P. is 13 and the sum of their squares is 91.find the smallest number.Explain the process if the numbers are estimated in the form of a/r , a , ar.

Someone please clarify the concept of Derangement in P n C.

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The sum of three numbers in a geometric progression is 13 and the sum of their squares is 91.Find the smallest number.

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