SOLUTION: find the domain of f(x)=(4-x)/(3+x) i thought it was (-infinity to -3 union -3 to positive infinity

Question 418016: find the domain of f(x)=(4-x)/(3+x)

i thought it was (-infinity to -3 union -3 to positive infinity
Answer by tinbar(133) (Show Source): You can put this solution on YOUR website!
That is correct, since f(-3) is not defined, we omit this from our domain. To be more mathematically precise, Domain: all x belonging to R(set of Real numbers) such that x is not equal to -3
That is equivalent to what you have set; (-infinity, -3) U (-3, +infinity).
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