If z^n = 1 what is the value of z?
1) n is a non-zero integer
2) z > 0
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Is it C?Cybermusings wrote:If z^n = 1 what is the value of z?
1) n is a non-zero integer
2) z > 0
1 - insufficient. If n is non-zero, z is +1 or -1
2 - insufficient. If z > 0, there are 2 possibilities: z=n=1 or n=0,z=any num
Together, we can solve for z = 1
Hence C
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