Re: ISI 2004 ME - I Answer Key

Posted by AJ on May 10, 2012; 7:40pm
URL: http://discussion-forum.276.s1.nabble.com/ISI-2004-ME-I-Answer-Key-tp7515784p7548047.html

Hi, I also meant q.no. 3

f'(x) = 3(x-a)^2+3(x-b)^2+3(x-c)^2

f'(x)>0

therefore, function is strictly increasing...
So, it can cross x-axis only once...