If k=-1, which of the following is (are) true?
1. k^k=k
2. | k| =-k.
3.k^0=-k
A. 1 only
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
E. 1. 2. and 3.
OA: E [/spoiler]
1. k^k=k
2. | k| =-k.
3.k^0=-k
A. 1 only
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
E. 1. 2. and 3.
OA: E [/spoiler]
