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Unformatted text preview:- 3 x 3 + x - 4 1 1 As x →-∞ , ƒ ( x ) → rises left As x → ∞ , ƒ ( x ) → falls right 3. f(x) = 4 x 5 + x - 3 None 1 As x →-∞ , ƒ ( x ) → falls left As x → ∞ , ƒ ( x ) → rises right 4. f(x) = 4 x 3 - x 4 + x + 5 2 2 As x →-∞ , ƒ ( x ) → falls left As x → ∞ , ƒ ( x ) → falls right