Here we will work out the first problem step by step (click here):

**1. Try Substitution**

By substituting in 4, we get that the limit approaches an indeterminate form. Therefore, this method does not work.

**2. Rationalize the function by multiply the numerator and denominator by the conjugate**

We multiplied the numerator and denominator by the conjugate of √x-2 in order to get rid of the radical. Make sure not to multiply out the denominator in case we can factor out something.

**3. Factoring**

We factored out (x-4) because it was in the numerator and the denominator.

**4. Substitution**

Here’s another example (click here):

In this next example we do not need to multiply the numerator and denominator by the conjugate. We are able to algebraically manipulate the function in order to rationalize it.

Here’s the example (click here):

There are most steps to this method, which may make it seem hard. As long as you write out each step and pay attention to the sign changes, you should be able to do it. Next post will be about solving limits of rational functions.

Until next time,

Leah

Very illustrative, thankyou!

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