bacali wrote:If k=-1, which of the following is (are) true?
1. k^k=k
2. | k| =-k.
3.k^0=-k

1. -1^-1= which means -1 divided by 1, which gives you -1, so correct
absolute value of -1 = 1, but it says negative of -1, which means positive. -(-2. 1)=1, so correct
3. -1^0 = 1, again, -(-1) = 1, so correct. anything to 0 power is 1.

so all of them are correct.