Find the domain and range of each of the...

Find the domain and range of each of the following real valued function: `f(x)=-|x|` .

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1)f(x)=-|x|
Domain={R}=R
Range={y}=negative part of R
2)y=f(x)
`y^2=9-x^2`
`x^2+y^2=9`
Domain={x}=(-3,3)
Range={y}=(-3.3)

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