Question:medium

Find the derivative of \( f(x) = 4x^3 - 6x^2 + 2x - 5 \).

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Remember: Use the power rule for differentiation for each term of the polynomial function.
Updated On: Nov 26, 2025
  • \( 12x^2 - 12x + 2 \)
  • \( 12x^2 - 10x + 2 \)
  • \( 12x^2 - 12x + 5 \)
  • \( 12x^2 - 10x + 3 \)
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The Correct Option is A

Solution and Explanation

Step 1: Apply the power rule of differentiation
The power rule for differentiation states that the derivative of \( ax^n \) is \( a \cdot n \cdot x^{n-1} \).
Step 2: Differentiate each term individually Given the function:\[f(x) = 4x^3 - 6x^2 + 2x - 5\]Differentiating each term yields:- Derivative of \( 4x^3 \): \( 12x^2 \),
- Derivative of \( -6x^2 \): \( -12x \),
- Derivative of \( 2x \): \( 2 \),
- Derivative of the constant \( -5 \): \( 0 \).
Combining these results, the derivative of \( f(x) \) is:\[f'(x) = 12x^2 - 12x + 2\]Answer: The derivative of \( f(x) = 4x^3 - 6x^2 + 2x - 5 \) is \( 12x^2 - 12x + 2 \). This corresponds to option (1).
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