math
posted by Carolyn .
Let
f(x) = 2x/(x^2+9).
Find the domain of f. Write your answer using interval notation.

math 
Reiny
since the denominator can never equal to zero and it contains no square roots or other strange operators,
domain : x ∊ R
I like the "old fashioned" format I used, I always have to look up this "interval notation stuff"
I will let you write it your way.
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