maaadhu wrote:

Sorry this might sound stupid but I have a question regarding division by zero.

I know division by zero is undefined.

For ex, In DS questions, if its given that x/y > 0. Can we assume that y is not equal to zero?

You wouldn't even need to assume. Official questions mention explicitly y/x = ... such that \(x \neq 0\).

If somewhere it is not mentioned, you can assume it.

Mind you, that means GIVEN yx = x^2 and NOT GIVEN \(x \neq 0\), you cannot divide both sides by x.

\(yx/x = x^2/x\) is incorrect.

You must do this: \(yx - x^2 = 0\)

\(x(y - x) = 0\)

\(x = 0\) or \(y = x\)

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