If `m` times the `m^(t h)` term of an A.P. is equal to `n` times its `n^(t h)` term, show that the `(m+n)^(t h)` term of the A.P. is zero.

Explanation

The `n^(th)` term of an `AP`
`n^(th)` term of `AP`

` t_n = a + (n − 1)d ->(1)`


`m^(th)` term of `AP `

`t_m​ = a + (m − 1)d -> (2)`


According to question,
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