For an A.P. show that `t_(m+n)+t_(m-n)=2t_m`

For an A.P, show that t_(m)+t_(2n)+m=2t_(m+n)

For an A.P., show that t_(m) + t_(2n + m) = 2t_( m + n)

For an A.P., show that t_(m) + t_(2n + m) = 2t_( m + n)

For an A.P. show that t _(m) + t _(2n + m) = 2 t _(m +n)

For an A.P., show that (m +n)th term + (m-n) term =2 xx m th term

If the sequence a_n is A.P., show that a_(m+n)+a_(m-n)=2a_mdot\

In an A.P., prove that : T_(m+n) + T_(m-n) = 2*T_(m)

In an A.P., prove that : T_(m+n) + T_(m-n) = 2*T_(m)

If t_(n)" is the " n^(th) term of an A.P. then the value of t_(n+1) -t_(n-1) is ……

Let t_r denote the r^(th) term of an A.P. Also suppose t_m=1/n and t_n=1/m for some positive integers m and n then which of the following is necessarily a root of the equation? (l+m-2n)x^2+(m+n-2l)x+(n+l-2m)=0