If m and n are distinct natural number,

If m and n are distinct natural number, then which of the following is/are integer/integers?
1. m/n + n/m
2. Mn(m/n + n/m)(m2 + n2)-1
3. Mn/(m2 + n2)
Select the correct answer using the code given below.
(a) 1 and 2
(b) 2 only
(c) 2 and 3
(d) 3 only

Anurag Mishra Professor Asked on 20th February 2016 in Maths.
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    Answer: (a) 1 and 2

    Anurag Mishra Professor Answered on 20th February 2016.
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