Limits doubt

Posted by Shefali on Jun 20, 2014; 1:21pm
URL: http://discussion-forum.276.s1.nabble.com/Limits-doubt-tp7593191.html

Q. (a^x-x^a)/(x^x-a^a)=-a
Find a.
 a 1
b 0
c e
d 1/e
e infinity