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# X|!=1 —How many integer solutions are there? A. Four

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SVP
Joined: 03 Feb 2003
Posts: 1607
Followers: 7

Kudos [?]: 84 [0], given: 0

X|!=1 —How many integer solutions are there? A. Four [#permalink]  05 Jun 2003, 23:41
|X|!=1 —How many integer solutions are there?

A. Four
B. Three
C. Two
D. One
E. None
Manager
Joined: 03 Jun 2003
Posts: 84
Location: Uruguay
Followers: 1

Kudos [?]: 0 [0], given: 0

I go with three either , 1, -1 and 0
SVP
Joined: 03 Feb 2003
Posts: 1607
Followers: 7

Kudos [?]: 84 [0], given: 0

I told you that it is simple...
Intern
Joined: 18 Feb 2005
Posts: 47
Followers: 1

Kudos [?]: 6 [0], given: 0

thank u guru stolyar!
Intern
Joined: 15 Mar 2006
Posts: 18
Followers: 0

Kudos [?]: 0 [0], given: 0

Ok, my analysis

0!=1! =1

Thus x can be 0, 1, -1
Current Student
Joined: 29 Jan 2005
Posts: 5240
Followers: 23

Kudos [?]: 191 [0], given: 0

(B). We must know that 0!=1
Manager
Joined: 30 Jan 2006
Posts: 146
Followers: 1

Kudos [?]: 10 [0], given: 0

A good one! I had no clue that 0! = 1

but now I know

thanks stolyar...
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