Hi,

I hope someone can help. I'm trying to solve the following question:

I don't understand the second line of the solution (starting at "thus"):

For example, what is the purpose behind letting the the limit as x approaches 1 for {[f(x) - 8] + 8}? What's the meaning of adding +8? Does it have to do with the fact that -8 and +8 cancel each other out?

- Olivia