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The Domain of the Function...  TOPIC_SOLVED

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.
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The Domain of the Function...

Postby ShadoeDysteria on Wed Sep 22, 2010 12:19 am

Ex. The domain of the function: f(x) = sqrt (x) is x > 0


I don't really understand how this is to be.
(Sorry, I am terribly horrible at math; Don't even understand why I'm in Algebra.)
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Postby stapel_eliz on Wed Sep 22, 2010 11:03 am

ShadoeDysteria wrote:
Ex. The domain of the function: f(x) = sqrt (x) is x > 0


I don't really understand how this is to be.

For this particular example, consider the radical. Can you have a negative number inside a square root?

(Note: The domain should actually be "x > 0".)

To learn in general about how to find domains and ranges, try here. :wink:
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