Question: I need some help with domain and range in Algebra. I have multiple questions in which I have no idea how to get the answer.

I need some help with domain and range in Algebra. I have multiple questions in which I have no idea how to get the answer.

1) Domain of f(x)= x +3

2) Range of f(x)= x-3 (the 3 is under the square root)

3) Domain of f(x)= x^2 - 3

4) Range of f(x)= x^2 + 3

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