Determine the point of inflection for the function f(x) = x^4 - 4x^3 + 6x^2.

Practice Questions

Q1
Determine the point of inflection for the function f(x) = x^4 - 4x^3 + 6x^2.
  1. (1, 3)
  2. (2, 2)
  3. (3, 1)
  4. (0, 0)

Questions & Step-by-Step Solutions

Determine the point of inflection for the function f(x) = x^4 - 4x^3 + 6x^2.
  • Step 1: Start with the function f(x) = x^4 - 4x^3 + 6x^2.
  • Step 2: Find the first derivative f'(x) to understand the slope of the function.
  • Step 3: Find the second derivative f''(x) to determine the concavity of the function.
  • Step 4: Set the second derivative f''(x) equal to 0 to find potential points of inflection.
  • Step 5: Solve the equation 12x^2 - 24x + 12 = 0 to find the values of x.
  • Step 6: Factor or use the quadratic formula to find the solutions, which are x = 1 and x = 2.
  • Step 7: Test intervals around x = 1 and x = 2 to see if the concavity changes.
  • Step 8: Determine that there is a change in concavity at x = 1, confirming it as a point of inflection.
  • Second Derivative Test – The question tests the understanding of finding points of inflection using the second derivative of a function.
  • Concavity – It assesses the ability to determine changes in concavity by analyzing the sign of the second derivative.
  • Critical Points – The question involves identifying critical points where the second derivative equals zero.
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