Find the derivative of f(x) = 4x^3 - 2x + 1. (2022)

Practice Questions

Q1
Find the derivative of f(x) = 4x^3 - 2x + 1. (2022)
  1. 12x^2 - 2
  2. 12x^2 + 2
  3. 4x^2 - 2
  4. 4x^2 + 2

Questions & Step-by-Step Solutions

Find the derivative of f(x) = 4x^3 - 2x + 1. (2022)
  • Step 1: Identify the function f(x) = 4x^3 - 2x + 1.
  • Step 2: Recognize that we need to find the derivative, which tells us the rate of change of the function.
  • Step 3: Use the power rule for derivatives, which states that if f(x) = ax^n, then f'(x) = n * ax^(n-1).
  • Step 4: Apply the power rule to each term in the function:
  • - For the first term 4x^3: The derivative is 3 * 4x^(3-1) = 12x^2.
  • - For the second term -2x: The derivative is 1 * -2x^(1-1) = -2.
  • - For the constant term 1: The derivative is 0 because the derivative of a constant is always 0.
  • Step 5: Combine the derivatives of all terms: f'(x) = 12x^2 - 2 + 0.
  • Step 6: Simplify the expression: f'(x) = 12x^2 - 2.
  • Power Rule – The power rule states that the derivative of x^n is n*x^(n-1).
  • Polynomial Derivatives – Finding the derivative of polynomial functions involves applying the power rule to each term.
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