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Domains of Functions

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I don't understand how to do this problem, can you please help me?

Given the functions f and g, determine the domain of f+g.

4. f(x)= 2x/(x-3) g(x)=3/(x+6)

  • Domains of Functions -

    That would be the set of real numbers x that result in real values for f + g

    For f(x) by itself, the domain is all numbers except 3. For g(x), the domain is all numbers except -6.

    For f + g, the domain is all numbers from -infinity to +infinity except -6 and 3.

  • Domains of Functions -

    For further reading I suggest

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