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

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.
Respond to this Question
Similar Questions

algebra
Graph the following function using the technique of shifting, compressing, strecthing and/or reflecting Find domain and range of the function g(x)=2sqrtx3+7 domain=___ (interval notation) range=_____ (interval notation) 
Algebra 2 help
Consider the following functions. f(x) = x2 − 3x, g(x) =√(x+2) (a) Find (f *g)(x). (Simplify your answer completely.) (B)Find the domain of f *g. (Enter your answer using interval notation.) (c) Find (g *f)(x). (Simplify … 
Math
Can you show me the work to get these answers also? 
Calculus
Find each of the following functions. f(x) = x2 − 3, g(x) = 5x + 2 (a) f compose g State the domain of the function. (Enter your answer using interval notation.) (b) g compose f State the domain of the function. (Enter your answer … 
Calc 1
Consider the function below. f(x) = (x^2)/(x−9)^2 (a) Find the vertical and horizontal asymptotes. x=? 
Algebradomain
I had to find the domain of a function, and my answer is that x is all real numbers except 5 and 6. How do I write that in interval notation? 
Algebra
Find the domain of the function. (Write your answer using interval notation.) sqrt(x)/ (4x^2 + 3x − 1) If you set the bottom equal to zero, I got that x can't be 1 or 1/4. But I'm not sure if that's right, or how to write the … 
math
Find the domain of the given function f. (Enter your answer using interval notation.) f(x) = 1/(x2 − 8x + 16) 
PreCal: Domain
[Note: I really need help on these Domain questions. I've been struggling with this all day] Consider the following: f(x)= 5/x , g(x)= 7/(x+7) Find the solutions to the following: 1). (f+g)(x) 2). Domain of (f+g)(x) [Use interval … 
PreCal: Domain (cont.)
I figured out problems 17, arithmetically (thank you all for the help on that) But not number 8: f(x)=5/x , g(x)=7/(x+7) #7). Find (f/g)(x) Answer ==> [5(x+7)]/[7x] #8). Find the domain of (f/g)(x). (enter your answer using interval …