Question

find the Domain of √9-x^2 ?
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Answer 1

Answer:

since f(x) =√9-x^2 is defined for every x in R, such that 9-x^2 is greater than or equal to 0

x^2 should be less than or equal to 9

That means x has to be less than or equal to 3 and more than or equal to (-3)

So the domain is [-3,3]