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In discrete mathematics, (z, *) is an integer plus a group. What is the-1 power of 0? What is the -2 power of 1?
(z, *) are grouped as integers. The unit element is 0.

Let the power of-1 be x, that is, 0+x = 0 = > x = 0.

Let the power of 1 be the inverse of 1. In addition group, the quadratic power of 1 is 1+ 1=2, and its inverse is y, so there is: 2+y = 0 = > y =-2.