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another DS question
by any 203 - Tuesday, 8 February 2011, 09:19 PM
 

Can anybody throw some light on below problem ,

If  Z ^N = 1  ,  what is the value of Z  ?

1) N is a non zero integer .

 2) Z > 0.


Re: another DS question
by Rajasekaran Rajaram - Friday, 3 June 2011, 12:05 AM
  From first condition, N is a non zero integer. This means that Z can only be 1.
Only then any power of Z will result in 1 as the result.
Re: another DS question
by mohan vuppuluri - Thursday, 9 June 2011, 09:20 AM
  correct answer choice should be "c" because only first choice implies that z can be either-1 or +1
Re: another DS question
by Faraz Md - Saturday, 18 June 2011, 06:35 PM
  Z^N = 1

Value of z =1.

Explanation :

Since z > 0,
lets divide solution in steps :

1.Assuming z > 1,

z = 1+k (k = any value)

Z^N = (1+k)^N
that never be equals to 1.

2.Assuming z0)
this gives z <1 /> now ,
Z^N = (1/k)^K <1 that="" would="" be="" always="" less="" than="" />
3. Assuming z =1

Z^N = 1^N = 1

Hence, Z =1