Question 144999
we define domain the set of all such values of x for which function has defined or finite value here f(x)= 10-{{{sqrt(3-x)}}} we look for the values of function for which it has defined value we know that square root of positive number exists only so 3-x>=0 or 3>=x or x>=3 hence all values of x are permissible except x<3  domain = all R except x<3