Question

The last question and can someone help me I'm confused

Answer 1

f(x) = 3/(x+5)

The domain of this function is {x|x ≠ - 5}. 

In other term this function is continuous (valid) for all values different from x = -5. If x = -5 then f(x) = 3/(5-5) = 3/0 = undetermined