###### Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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# Domain and Range - Problem 4

Alissa Fong
###### Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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One way to learn about domain restrictions is to look at specific functions that have domain restrictions. If you have a fraction with an x in the denominator, then you will have a domain restriction on x because dividing by zero is undefined. Any value of x that would make the denominator of the fraction zero is restricted from the domain. In a radical, we can not have the square root of a negative number, so any values of x that would make the radicand negative are excluded. In an exponential function, our output, or range could never be negative, so the range is limited to positive values only.

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