Number Properties book, chapter 4 problem set, number 15

[DanC]

I think this is a mistake in the book.

The question tells us that xyz<0, which means the product of xyz is negative. But the answer explanation assumes that the product of xyz is positive and thus renders an answer of negative for the problem. I think the answer to the problem should be positive.

[tommywallach]

Oh no! That does appear to be another typo. Now I feel ashamed of my book! Oh dear! : )

-t