isi 2004

Posted by seema on Apr 16, 2012; 7:23pm
URL: http://discussion-forum.276.s1.nabble.com/isi-2004-tp7471464.html

f(x)= (x-a)^3 + (x-b)^3 + (x-c)^3, a< b< c. The number of real roots of f(x)=0  ?

a) 3
b) 2
c) 1
d) 0