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The function f, of, xf(x) is defined below. What is the end behavior of f, of, xf(x)?f, of, x, equals, minus, 432, x, cubed, plus, 48, x, to the power 4 , plus, 7056, plus, 5544, x, minus, 1984, x, squared, plus, 8, x, to the power 5f(x)=−432x 3 +48x 4 +7056+5544x−1984x 2 +8x 5

Question

The function f, of, xf(x) is defined below. What is the end behavior of f, of, xf(x)?f, of, x, equals, minus, 432, x, cubed, plus, 48, x, to the power 4 , plus, 7056, plus, 5544, x, minus, 1984, x, squared, plus, 8, x, to the power 5f(x)=−432x 3 +48x 4 +7056+5544x−1984x 2 +8x 5

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Solution

The end behavior of a function is determined by the term with the highest degree in the function. In this case, the term with the highest degree is 8x^5.

Since the coefficient of this term is positive, the function will rise to positive infinity as x approaches positive infinity. This is often written as:

As x → ∞, f(x) → ∞.

Similarly, since the degree of this term is odd, the function will fall to negative infinity as x approaches negative infinity. This is often written as:

As x → -∞, f(x) → -∞.

So, the end behavior of the function f(x) = -432x^3 + 48x^4 + 7056 + 5544x - 1984x^2 + 8x^5 is:

As x → ∞, f(x) → ∞ and as x → -∞, f(x) → -∞.

This problem has been solved

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