Hi,
This is probably a very common question, but I just dont get it.
It is from the GMAT Prep Test.
If z^n = 1, what is the value of z?
1) n is a non-zero integer
2) z > 0
a) 1 alone is sufficient
b) 2 alone is sufficient
c) both together are sufficient
d) each is individually sufficient
e) they're not sufficient even together
The GMAT Test Prep says the answer is c). I understand that if we take them together we do get an answer, in comparison to taking 2) alone.
However, shouldn't the answer be a) ?
Solution -
If n is non-zero, the way 1 can be the answer is if z = 1. Thus, we got our answer, z = 1.
What's wrong with this?
Thanks
This is probably a very common question, but I just dont get it.
It is from the GMAT Prep Test.
If z^n = 1, what is the value of z?
1) n is a non-zero integer
2) z > 0
a) 1 alone is sufficient
b) 2 alone is sufficient
c) both together are sufficient
d) each is individually sufficient
e) they're not sufficient even together
The GMAT Test Prep says the answer is c). I understand that if we take them together we do get an answer, in comparison to taking 2) alone.
However, shouldn't the answer be a) ?
Solution -
If n is non-zero, the way 1 can be the answer is if z = 1. Thus, we got our answer, z = 1.
What's wrong with this?
Thanks
