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Let `f,\ g` be two real functions defined by `f(x)=sqrt(x+1\ )a n d\ g(x)=sqrt(9-x^2)dot` Then describe each of the following function: `g-f`

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`(g-f)(x)=g(x)-f(x)`
`=sqrt(9-x^2)-sqrt(x+1)`
The domain of `g-f` `=` domain of `g` `cap` domain of `f`
`=[-3, 3] cap [-1, oo)`
`=[-1, 3]`
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