Re: DSE 2008 Q55, Q56, Q57

Posted by phelps.phan on Jun 09, 2014; 5:29am
URL: http://discussion-forum.276.s1.nabble.com/DSE-2008-Q55-Q56-Q57-tp7591879p7591991.html

Q57: The different possible sets are 1/x, 1/x^2, 1/x^3,...
To find the intersection we equate 1/x = 1/x^2 which gives x=1. If we do it for any of the sets above we get x^n=1 ie x=1 (as the domain is defined for positive a). So that single point is x=1