Prove #lim_(xrarr5)(2x+4)=14#?
1 Answer
We can prove this in a number of ways. Since this is classified as pre-calculus, I will avoid an
In general, a limit is the value that a function approaches. Let
First, let's just justify it numerically.
If we plug in values just barely less than
and so on and so forth
The same applies if we plug in values just barely above
This means that as
Now, we can also sort of prove this limit:
For a function that is "simple", such as this line, we can actually just plug in the value and get our answer, too.