Please help me, I’ll mark your answer as brainliest!

Answer:
(-∞ , -3) ∪ (-3 , ∞)
Step-by-step explanation:
when x+3=0 f(x) -> ∞
undefined point: x = -3
solution: x < -3 or x >-3
Interval notation: (-∞ , -3) ∪ (-3 , ∞)
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