Re: Sample Questions of ISI ME I (Mathematics) 2010 Discussion

Posted by Varsha on Apr 16, 2010; 4:40pm
URL: http://discussion-forum.276.s1.nabble.com/Sample-Questions-of-ISI-ME-I-Mathematics-2010-Discussion-tp4850019p4914012.html

The function f(x) = x(square_root(x) + square_root(x + 9)) is
(a) continuously differentiable at x = 0,
(b) continuous but not differentiable at x = 0,
(c) differentiable but the derivative is not continuous at x = 0,
(d) not differentiable at x = 0.
Note: square_root(g(x)) stands for square root of g(x)


Sir, cud u explain hw u got it as continuously differentiable at x = 0