if f(x)is

greater or equal to 10x–42 but less than or equal to x2+2x–26
determine limx4f(x) =

What theorem did you use to arrive at your answer?

4 answers

I would like to know what limx4f(x) means.
as lim goes to 4
i got -2
but i don't know what the theorem is called
http://en.wikipedia.org/wiki/Squeeze_theorem

Not all will call this a theorem, many call it a principle.