If f(x) = x^3 - 3x^2 + 4, then f'(1) is equal to?

Practice Questions

Q1
If f(x) = x^3 - 3x^2 + 4, then f'(1) is equal to?
  1. 1
  2. 2
  3. 3
  4. 4

Questions & Step-by-Step Solutions

If f(x) = x^3 - 3x^2 + 4, then f'(1) is equal to?
  • Step 1: Identify the function f(x) = x^3 - 3x^2 + 4.
  • Step 2: Find the derivative of the function, denoted as f'(x).
  • Step 3: Use the power rule to differentiate each term: The derivative of x^3 is 3x^2, the derivative of -3x^2 is -6x, and the derivative of the constant 4 is 0.
  • Step 4: Combine the derivatives to get f'(x) = 3x^2 - 6x.
  • Step 5: Substitute x = 1 into the derivative: f'(1) = 3(1)^2 - 6(1).
  • Step 6: Calculate 3(1)^2 which equals 3, and calculate -6(1) which equals -6.
  • Step 7: Combine the results: 3 - 6 = -3.
  • Step 8: Conclude that f'(1) is equal to -3.
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