# What is a domain restriction? AND How do you find domain restrictions??

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I understand how to solve for domain restrictions for problems like: #f(x)=(x^2 -4)/(x^2-10x-24)# . But I don't get how to solve problems like: #f(x)=120(1/2)^x-7# and : #f(x)=-sqrt(2x-4)+7# and also problems like: #f(x)=2log_4(x)-3#

PLEASE, I NEED HELP WITH DOMAIN RESTRICTIONS!!!!!!

I understand how to solve for domain restrictions for problems like:

PLEASE, I NEED HELP WITH DOMAIN RESTRICTIONS!!!!!!

##### 1 Answer

Informally, the domain for some function

For example, consider the function

When trying to find the domain of a function, it helps to plug in some values in your head as well as consider the parent graph. These both will give you some insight as to what values, if any, need to be excluded from the domain.

You provided the function

With the function

With the function

Be on the lookout for what values of