The exponential function f(x) has a horizontal asymptote at y = 3. What is the
end behavior of f(x)?

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Answer:
(-∞, 3), (+∞, +∞)
Step-by-step explanation:
As x gets more negative the function will approach the horizontal asymptote, so lim(f(x)) = 3 as x → -∞.
As x gets more positive, so does the function, so lim(f(x)) → +∞ as x → +∞.