Re: ISI INTERVIEW PREP

Posted by neha on Jul 01, 2012; 8:36am
URL: http://discussion-forum.276.s1.nabble.com/ISI-INTERVIEW-PREP-tp7578819p7578897.html

With ref. to
 Prove that there is a unique function f : R2 → R satisfying both
the properties below:
(i) f(x,y) is non-decreasing in x and non-decreasing in y;
(ii) f(x,x) = c for all x ∈ R, where c is a constant.

I was just thinking cant we take f(x,y)= 3 or something for all the x,y belonging to R? This function is also satisfying both the properties.