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Which of the following is the derivative of the function [tex]f(x) = x^3 - 27x + 9[/tex]?

A. [tex]3x^2 - 27[/tex]
B. [tex]3x^2 + 27[/tex]
C. [tex]3x^3 - 27[/tex]
D. [tex]3x^3 + 27[/tex]

Answer :

Final answer:

The correct derivative of the function f(x) = x³ - 27x + 9 is 3x² - 27.

Explanation:

In mathematics, the derivative of a function measures how that function changes as the variables change. Given the function f(x)=x³−27x+9, to find the derivative, apply the power rule, which states that the derivative of xⁿ is n×xⁿ⁻¹. Also, the derivative of a constant times x is the constant. Therefore, the derivative of x³ is 3x² the derivative of -27x is -27, and the derivative of the constant 9 is 0 since constants don't affect rates of change. So, the derivative of f(x) is 3x²−27. Thus, among options you've listed, Option 1: 3x²−27 is correct. The other options are incorrect because they do not match the calculated derivative.

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