If mc005-1.jpg and d(x) = x + 3, what is the domain of (cd)(x)? all real values of x all real values of x except x = 2 all real values of x except x = –3 all real values of x except x = 2 and x = –3
(cd)(x) = 5/(x-2) × x + 3 = 5(x + 3)/(x-2) The denominator of the function (cd)(x) can not be equal to zero because it would make it undefined. Therefore, x - 2 = 0 and x = 2 will be excluded. Hence, The domain is set of all the real numbers and x ≠ 2
