What real values of x are not in the domain of
$f(x) = \frac{1}{|x^2 + 3x - 4| + |x^2 + 9x - 10|}$
Not as difficult as it might appear
Note that when x = 1, both expressions in the denominator = 0
So ..... only x = 1 is not in the domain
See the graph here : https://www.desmos.com/calculator/wlhkfsdgpf
