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

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

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

Let T_(r ) be the rth term of an A.P. for r = 1,2,3, "………." . If for some positive integers m,n we have : T_(m) = ( 1)/( n) and T_(n) = ( 1)/(m) , then T_(mn ) equals :

Let T_(r) be the rth term of an A.P. If m. T_(m) = n.T_(n) , the show that, T_(m+n) = 0 .