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if sum up to  'n' terms of series 1+1/2+1/22+1/23.........<2-1/1000 then the possible positive integral value of n is   (a)21 (b)16 (c)8 (d)9 (e)1...

eight times of A.M of a and b is same as 9 time of H.M of a,b then what is the ratio of a:b. (a)3:2 (b)2:1 (c)2:3 (d)1:2 (e)1:3 (f)3:1

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