SOLUTION: find the domain of f(x)=7+ sqrt (3x+21), and express it using interval notation.

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Question 48060: find the domain of f(x)=7+ sqrt (3x+21), and express it using interval notation.

Answer by stanbon(57290) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=7+ sqrt (3x+21)
The 3x+21 must not be negative.
So, 3x+21>=0
3x>=-21
x>=-7
The domain is all Real Numbers greater than or equal to -7.
Cheers,
Stan H.