The number of all pairs (m, n) where m and n are positive integers, su – McqOptions

MCQOPTIONS

1.	The number of all pairs (m, n) where m and n are positive integers, such that 1/m + 1/n - 1/mn = 2/5 is
A.	6
B.	5
C.	4
D.	2
Answer» D. 2

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