Question

1,1/2,1/3,........1/n ka hormonic mean kya hogaa

Answer 1

Answer:

2n + 1

Explanation:

To find the harmonic mean of a set of numbers, we

take their reciprocals

find out the mean of the reciprocals

take the reciprocal of this mean

Now, for  

1 , 1 /2, 1/ 3 , ... , 1/ n

the reciprocals are  1 , 2 , 3 , ... , n  their mean is  1/ n   (  1 + 2 + 3 + ... +  n ) = n + 1 /2

whose reciprocal is  2 /n + 1

The required harmonic mean is  2 /n+ 1