Question

find the domain of 1/ root of( mod X)- X

Answer 1

Answer:

Let

$f(x) \: = \frac{1}{ \sqrt{ |x| - x} }$

So the function is undefined when

$\sqrt{ |x| - x} \: \: = 0$

This is true when

$|x| = x$

This is true when

$x \geqslant 0$

So the required domain is the set of negative real numbers