How many pairs of (x,y) can be chosen from the set {2, 3, 6, 8, 9} such that \frac{x}{y}+\frac{y}{x}=2 , where x ≠ y ?

UPSC CDS 1 2021 Math Paper

Question : 33 of 100

Marks: +1, -0

How many pairs of (x,y) can be chosen from the set {2, 3, 6, 8, 9} such that

=2 , where x ≠ y ?

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