(-inf, 3) U (3, inf) 1/0 is undefined. So we want to find a value x that makes the denominator 0. 0 = sqrt(x - 3) Square both sides to make it easier to work with 0^2 = x-3 0 = x - 3 x = 3 So the function is undefined when x = 3. This means that 3 is not in the domain for f(x).
why is the letter limit 420 (lol lol) ? i tried to explain but got beat cause i had to shorten my response multiple times