`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 .

The nth term of a geometric progression is given by t_(n)=ar^(n-1) find the value of a, if t_(n)=32,r=4 and n=5 .