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OpenStudy (anonymous):
Please help me determine the end behavior of the given polynomial function?: f(x) = 3x^5 - x^3 + 1/2 (A) As x -> ∞, f(x) -> ∞, and as x -> -∞, f(x) -> -∞ (B) As x -> ∞, f(x) -> -∞, and as x -> -∞, f(x) -> ∞ (C) As x -> ∞, f(x) -> -∞, and as x -> -∞, f(x) -> -∞ (D) As x -> ∞, f(x) -> ∞, and as x -> -∞, f(x) -> ∞
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OpenStudy (math&ing001):
f(x) = 3x^5 - x^3 + 1/2 = x^3 (3x^2 - 1) + 1/2 Now the limit will only follow the sign of x^3 so : When x -> ∞ then x^3 -> ∞ thus f(x) -> ∞ And when x -> -∞, then x^3 -> -∞ so f(x) -> -∞
OpenStudy (anonymous):
so my answer's C? @math&ing001
OpenStudy (math&ing001):
Nope, try again When x -> ∞ then f(x) -> ∞ And when x -> -∞, f(x) -> -∞
OpenStudy (anonymous):
Ohhh so A? @math&ing001
OpenStudy (anonymous):
i think so
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OpenStudy (math&ing001):
Yep @JoeJoldin ! Sorry for the late response =)
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