If x is inversely proportional to y then which of the following is true? 

A) xy = k 

B) x/y = k 

C) 1/x = 1/y

D) xy = x + y

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2 Answers

Correct option is (A) xy = k

\(x\propto\frac1y\)

\(\Rightarrow\) \(x=\frac ky\)

\(\Rightarrow\) xy = k

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Correct option is  A) xy = k

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