Question:medium

Find the derivative of the function: \[ f(x) = 3x^3 - 5x^2 + 2x - 4 \]

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Use the power rule to differentiate terms of the form \( ax^n \), where \( n \) is a constant.
Updated On: Nov 26, 2025
  • \( 9x^2 - 10x + 2 \)
  • \( 9x^2 - 10x + 1 \)
  • \( 3x^2 - 5x + 2 \)
  • \( 9x^2 - 5x + 2 \)
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The Correct Option is A

Solution and Explanation

Step 1: Define the function. The function provided is: \[ f(x) = 3x^3 - 5x^2 + 2x - 4 \] Step 2: Apply the power rule for differentiation. The power rule dictates that the derivative of \( ax^n \) is \( a \cdot n \cdot x^{n-1} \). Differentiating each term individually yields: \[ \frac{d}{dx}(3x^3) = 9x^2 \] \[ \frac{d}{dx}(-5x^2) = -10x \] \[ \frac{d}{dx}(2x) = 2 \] \[ \frac{d}{dx}(-4) = 0 \] Step 3: Sum the derivatives. The derivative of \( f(x) \) is obtained by summing the individual derivatives: \[ f'(x) = 9x^2 - 10x + 2 \] Answer: The derivative is \( 9x^2 - 10x + 2 \).
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