Question

What is the domain of the function y= square root of x+6-7?

Answer 1

Domain of y = sqrt(x + 6) - 7


Finding domain is trying to check the following valid conditions



condition 1: check for x such that the value in square root must greater or equal to 0 
(applicable here)
x + 6 >= 0
x > -6  ... this is the answer


condition 2: check for x such that the divisor must not be zero
(not applicable here)  


condition 3(misc) : check some functions
for example ... log(0) is invalid...