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**Question 1: (SOLVED, but I still don't understand the general method for solving these kinds of problems)**
For each

, find a

so that

is true. What does this show?

(By the way, how do I get the absolute characters to extend all the way in LaTeX?)

**SOLVED: Use \left| and \right|** **Question 2: (SOLVED, but I still don't understand the general method for solving these kinds of problems)**
Show that

when

using the definition of limits.

This is what I've got so far:

As soon as we've chosen a

, then we'll be able to find a

so that

when

.

Note: