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jmallis Group Title

The graph of the function has more than one turning point. Use the graphing calculator to find the coordinates of the turning point that lies in the given interval. f(x)= 7x^3 -9x^2 -x+1, [-1, 10] The coordinates of the turning point are

  • 2 years ago
  • 2 years ago

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  1. TuringTest Group Title
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    Is this calculus?

    • 2 years ago
  2. jmallis Group Title
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    College Algebra

    • 2 years ago
  3. sauravshakya Group Title
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    Find f'(x)

    • 2 years ago
  4. TuringTest Group Title
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    The asker said algebra, so presumably that means no calculus allowed.

    • 2 years ago
  5. jmallis Group Title
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    So what do I do?

    • 2 years ago
  6. TuringTest Group Title
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    it would certainly be a much easier calculus problem not sure I know a method for this using only algebra, I'll have to think on it...

    • 2 years ago
  7. jmallis Group Title
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    ok

    • 2 years ago
  8. sauravshakya Group Title
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    Graph it

    • 2 years ago
  9. TuringTest Group Title
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    that's all I can think of too

    • 2 years ago
  10. jmallis Group Title
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    And the calculus way?

    • 2 years ago
  11. TuringTest Group Title
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    find x=a such that f'(a)=0

    • 2 years ago
  12. TuringTest Group Title
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    ...in the given interval

    • 2 years ago
  13. cinar Group Title
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    http://www.wolframalpha.com/input/?i=plot+y%3D7x^3+-9x^2+-x%2B1

    • 2 years ago
  14. jmallis Group Title
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    ok so what would the coordinates of the turning point?

    • 2 years ago
  15. cinar Group Title
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    It says "Use the graphing calculator to find the coordinates of the turning point that lies in the given interval"

    • 2 years ago
  16. TuringTest Group Title
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    wow I managed to not even read the post :P thanks cinar

    • 2 years ago
  17. jmallis Group Title
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    I dont have one

    • 2 years ago
  18. cinar Group Title
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    (:

    • 2 years ago
  19. TuringTest Group Title
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    the website wolfram alpha is a pretty good one http://www.wolframalpha.com/

    • 2 years ago
  20. TuringTest Group Title
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    that site serves as a graphing calculator

    • 2 years ago
  21. jmallis Group Title
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    laptop blocked it

    • 2 years ago
  22. cinar Group Title
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    http://answers.yahoo.com/question/index?qid=20091030113220AAieoZy

    • 2 years ago
  23. TuringTest Group Title
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    that method again requires calculus your three options are to buy the graphing calculator, get wolfram working on your laptop, or learn calculus besides that I have no ideas

    • 2 years ago
  24. cinar Group Title
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    I guess you have to use derivative

    • 2 years ago
  25. cinar Group Title
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    they are roughly (0.9,-2) (0.1,1) but exactly

    • 2 years ago
  26. jmallis Group Title
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    It was (-0.05, 1.03)

    • 2 years ago
  27. cinar Group Title
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    http://www.wolframalpha.com/input/?i=max+y%3D7x^3+-9x^2+-x%2B1

    • 2 years ago
  28. TuringTest Group Title
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    wolfram disagrees o_O

    • 2 years ago
  29. cinar Group Title
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    http://www.wolframalpha.com/input/?i=min+y%3D7x^3+-9x^2+-x%2B1

    • 2 years ago
  30. cinar Group Title
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    that's right, I just used my eyes (:

    • 2 years ago
  31. cinar Group Title
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    (-0.05,1.03) and (0.91,-2.09) these are your answer..

    • 2 years ago
  32. cinar Group Title
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    I made typo for this they are roughly (0.9,-2) (0.1,1) but exactly

    • 2 years ago
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