If Mth term of A.P is 1/n and Nth term of same A.P is 1/m then what is the value of S(m+n) th term ?

If Mth term of A.P is 1/n and Nth term of same A.P is 1/m then what is

1.	If Mth term of A.P is 1/n and Nth term of same A.P is 1/m then what is the value of S(m+n) th term ?
Answer» (m+n)square +m+n/2mn aa rha hai answer......