If `sumn ,(sqrt(10))/3sumn^2,sumn^3` are in GP, then the value of `n` is

If sum_(n,)n,(sqrt(10))/(3)sum n^(2),sum n^(3) are in GP,then the value of n is

If Sigman, ( sqrt(10))/( 3)Sigman^(2) , Sigman^(3) are in G.P., then the value of n is :

If sum_(r=1)^(n) r(sqrt(10))/(3)sum_(r=1)^(n)r^(2),sum_(r=1)^(n) r^(3) are in G.P., then the value of n, is

If sum_(r=1)^(n) r(sqrt(10))/(3)sum_(r=1)^(n)r^(2),sum_(r=1)^(n) r^(3) are in G.P., then the value of n, is

If n!,3xx(n!)" and "(n+1)! are in GP, then the value of n will be

If (1-sqrt(2))^(n),1,(1+sqrt(2))^(n) are in G.P., then n can be

If (sqrt(3))^(5) xx 81 = 3^(n) xx 3sqrt(3) then the value of n is

If sumn=210 , then sumn^2=