dse 2007

Posted by seema on Mar 29, 2012; 9:08pm
URL: http://discussion-forum.276.s1.nabble.com/dse-2007-tp7419330.html

The set : intersection(n=1 to infinity) (-1-n^-1, 1+n^-1) is identical to
a.  (-1,1]
b.  [-1,1)
c.  (-1,1)
d.  [-1,1]
Pls tell me how to solve this.