If z^n = 1, what is the value of z?
1. n is a non zero integer.
2. z '>' 0.
For z^n = 1, and n being a non zero integer, there are 3 possible ways.
a. 1^1 = 1
b. 1^- 1 = 1
c. - 1^2 = 1
Statement 1 not conclusive. Z could be 1 or -1.
Statement 2: z '>' 0.
==> we need both statements to solve for z.
Answer: C.
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