If lth, mth and nth terms of an HP are x,y and z respectively, then find the value of yz(m-n) + xz(n-l) + xy(l -m).

If lth, mth and nth terms of an HP are x,y and z respectively, then f

1.	If lth, mth and nth terms of an HP are x,y and z respectively, then find the value of yz(m-n) + xz(n-l) + xy(l -m).
Answer» If lth, mth and nth terms of an HP are x,y and z respectively, then find the value of yz(m-n) + xz(n-l) + xy(l -m).