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onegirl

Find all critical numbers by hand. If available, use graphing technology to determine whether the critical number represents a local maximum, local minimum, or neither. f(x) = x^4 - 3x^3 + 2

  • one year ago
  • one year ago

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  1. onegirl
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    @rajathsbhat can u help?

    • one year ago
  2. rajathsbhat
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    not too sure about this :\

    • one year ago
  3. onegirl
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    ok

    • one year ago
  4. onegirl
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    @electrokid can u help?

    • one year ago
  5. tomatooooo
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    are you allowed to use calculus for this? or algebra 2?

    • one year ago
  6. modphysnoob
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    take derivative

    • one year ago
  7. onegirl
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    okay the derivative is x^2(4x - 9)

    • one year ago
  8. onegirl
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    or 4x^3 - 9x^2

    • one year ago
  9. modphysnoob
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    set that equal to 0 and solve for x

    • one year ago
  10. onegirl
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    okay

    • one year ago
  11. onegirl
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    i get 0 and 9/4

    • one year ago
  12. modphysnoob
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    that's your criticle number

    • one year ago
  13. onegirl
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    okay so thats it?

    • one year ago
  14. onegirl
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    how do i determine whether it is local maximum, minimum or either

    • one year ago
  15. onegirl
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    neither*

    • one year ago
  16. modphysnoob
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    1)Plug in Crit point into F''(t); positive number mean min, negative number mean max

    • one year ago
  17. onegirl
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    okay thanks

    • one year ago
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