
Mark M. answered 01/10/17
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
f(x) = 4 / (x - 5)

Mark M.
A function is undefined when the denominator equals zero.
So the function must be in the form f(x) = b / (x - 5), when x = 5 the function is undefined.
To determine b
f(1) = -1
-1 = b / (1 - 5)
-1 = b / -4
4 = b
Report
01/19/17
Tomas L.
01/19/17