jjack0310 wrote:
For #7. How can we assume there is no 0 in set A? It just says numbers (either negative or non negative)
0 is neither. So I used 0 too and got the wrong answer.
Thanks
0 is neither. So I used 0 too and got the wrong answer.
Thanks
Please read the solution again: 12-easy-pieces-or-not-126366.html#p1033933 Pay attention to the term "non-negative" there (0 and positive) and you'll notice that no assumtion was made.