If there are four H. M's between `1/12and1/42`, find the third harmonic mean.

If three are four harmonic means between 1/12, 1/42, then the third harmonic mean is

Four geometric means are inserted between 1/8 and 128. Find the third geometric mean.

Find the Harmonic Mean(HM ) between 1 and 1/2

There are p A.M.'s between 5 and 41 and third mean : (p-1)th mean = 2 : 5, find p.

Insert three harmonic between (1)/(12) and (1)/(20) .

If between 1 and 1/31 there are n H.M's and ratio of 7th and (n-1)^th harmonic means is 9:5, then values of n is

If between 1and 1/31 there are n H.M.M.l'sand ratio of 7th and (n-1) th harmonic means is 9: 5.then value of n is

If n is a root of x^(2)(1-ac)-x(a^(2)+c^(2))-(1+ac)=0 and if n harmonic means are inserted between a and c, find the difference between the first and the last means.

If n is a root of x^(2)(1-ac)-x(a^(2)+c^(2))-(1+ac)=0 and if n harmonic means are inserted between a and c, find the difference between the first and the last means.