Re: ISI 2012 ME - I Answer Key

Posted by soumyab_sl on Sep 24, 2013; 6:31am
URL: http://discussion-forum.276.s1.nabble.com/ISI-2012-ME-I-Answer-Key-tp7515795p7584004.html

please help me with q)14

we are gating 1) for root x             - x should be greater than equal to zero
                     2) for roor 3-x         - x should be x less than equal to three
                     3) fir root x^2 - 4x   - x equal to zero and x greater than equal to zero

so combining 1,2 and 3 we get f(x)  is real for x belonging to  [0,3]u[4,infinity)...............but the answer is only zero...............can u explain why???????????????????