`51+53+55+dotdotdot+t_n=5151` Then find the value of `t_n`

51+53+55++t_(n)=5151. Then find the value of t_(n)

If 51+53+55+…+ t_(n) = 5151 , then find the value of t_(n) .

Find the value of 51+52+53+...+90

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n d n , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n d n , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n dn , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

Let T_r denote the rth term of a G.P. for r=1,2,3, If for some positive integers ma n dn , we have T_m=1//n^2 and T_n=1//m^2 , then find the value of T_(m+n//2.)

Let T_(n) denote the number of triangles which can be formed using the vertices of a regular polygon of n sides . If T_(n+1)-T_(n)=21 then find the values of n .

IF T_n=5n-2 , then find S_4 .