If the harmonic mean between a and b be H, then the value of `1/(H-a)+1/(H-b)` =?

If H_1. H_2...., H_n are n harmonic means between a and b (!=a) , then the value of (H_1+a)/(H_1-a)+(H_n+b)/(H_n-b) =

If H be the harmonic mean of a and b then find the value of H/a+H/b-2

If H is the harmonic mean between Pa n dQ then find the value of H//P+H//Qdot

Statement -I: If H is the harmonic mean between a and b then (H+ a)/(H-a)+(H+ b)/(H- b)=1/2 Statement - II : If H is the harmonic mean between x and y then H=(2xy)/(x+y)

If b is the harmonic mean between a and c, then prove that (1)/(b - a) + (1)/(b - c) = (1)/(a) + (1)/(c)

If H be the H.M. between a and b, then the value of (H)/(a)+(H)/(b) is

If H be the harmonic mean between x and y, then show that (H+x)/(H-x)+(H+y)/(H-y)=2

If 2010 is a root of x^(2)(1 - pq) - x(p^(2) + q^(2)) - (1 + pq) = 0 and 2010 harmonic mean are inserted between p and q then the value of (h_(1) - h_(2010))/(pq(p - q)) is

If the A.M between a and b is m times their H.M then a:b is

If H_1.,H_2,…,H_20 are 20 harmonic means between 2 and 3, then (H_1+2)/(H_1-2)+(H_20+3)/(H_20-3)=