For the function f(x) = 2x^3 - 9x^2 + 12x, find the critical points. (2022)

Practice Questions

Q1
For the function f(x) = 2x^3 - 9x^2 + 12x, find the critical points. (2022)
  1. (0, 0)
  2. (1, 5)
  3. (2, 0)
  4. (3, 3)

Questions & Step-by-Step Solutions

For the function f(x) = 2x^3 - 9x^2 + 12x, find the critical points. (2022)
  • Step 1: Start with the function f(x) = 2x^3 - 9x^2 + 12x.
  • Step 2: Find the derivative of the function, which is f'(x).
  • Step 3: Use the power rule to differentiate: f'(x) = 6x^2 - 18x + 12.
  • Step 4: Set the derivative equal to zero to find critical points: 6x^2 - 18x + 12 = 0.
  • Step 5: Simplify the equation by dividing everything by 6: x^2 - 3x + 2 = 0.
  • Step 6: Factor the quadratic equation: (x - 1)(x - 2) = 0.
  • Step 7: Solve for x by setting each factor to zero: x - 1 = 0 or x - 2 = 0.
  • Step 8: This gives us the solutions: x = 1 and x = 2.
  • Step 9: The critical points are x = 1 and x = 2.
  • Finding Critical Points – This involves taking the derivative of the function and setting it to zero to find points where the function's slope is zero.
  • Derivative Calculation – Understanding how to correctly compute the derivative of a polynomial function.
  • Quadratic Equation Solutions – Solving the resulting quadratic equation to find the values of x that yield critical points.
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