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Mathematics 8 Online
OpenStudy (anonymous):

find the domain of the function. f(x) = sqrt 6-x

OpenStudy (mathstudent55):

Is it \(\large f(x) = \sqrt{6 - x} \) ?

OpenStudy (anonymous):

A. (-∞, 6) (6, ∞) B. (-∞, sqrt6) (sqrt6 , ∞) C. (-∞, sqrt6] D. (-∞, 6]

OpenStudy (anonymous):

yes that is right student

OpenStudy (mathstudent55):

Look in the function. You have x inside a square root. What numbers can you not take the square root of?

OpenStudy (anonymous):

x

OpenStudy (mathstudent55):

No. Look at the examples below. Can you take all 3 square roots below? |dw:1439842157310:dw|

OpenStudy (anonymous):

no

OpenStudy (mathstudent55):

Can you take any of the square roots in the figure?

OpenStudy (anonymous):

no

OpenStudy (mathstudent55):

This is what my calculator does with those square roots. |dw:1439842248218:dw|

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