SOLUTION: I could use some help on the following. The instructions say: Find the domain for the following function and write your answer using interval notation. f(x)= inside swuare ro

Question 122482: I could use some help on the following. The instructions say: Find the domain for the following function and write your answer using interval notation.
f(x)= inside swuare root is 2x+6
I would appreciate any help.
Thank You
Kay
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
f(x) =
:
you know that 2x+6 has to be positive
Therefore if x < -3 the result would be a negative number inside the radical which is not allowed. the domain would be x => -3 to + infinity. (0 is allowed)
Interval notation [-3, oo)
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