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Yahoo!

The value of 5/(9x^2 + 6x + 11) is maximum when x=?

  • one year ago
  • one year ago

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  1. Yahoo!
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    9 x^2 + 6x + 11 should be minimum

    • one year ago
  2. mukushla
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    take derivative

    • one year ago
  3. Yahoo!
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    I dont think so

    • one year ago
  4. waterineyes
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    You should take derivative first..

    • one year ago
  5. mukushla
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    or complete the squre for 9 x^2 + 6x + 11

    • one year ago
  6. Yahoo!
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    18 x + 6

    • one year ago
  7. mukushla
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    well so x=-2 will minimize 9 x^2 + 6x + 11 and consequencly will maximize 5/9 x^2 + 6x + 11

    • one year ago
  8. Yahoo!
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    hw u got x = -2

    • one year ago
  9. Yahoo!
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    The answer should be x = -1/3

    • one year ago
  10. mukushla
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    sorry 18 x + 6=0 then x=-1/3

    • one year ago
  11. Yahoo!
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    got it thxxx

    • one year ago
  12. Pac1f1cIslander
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    Why was I sent this in a message? xD

    • one year ago
  13. robtobey
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    A plot of 5/(9x^2 + 6x + 11) and it's derivative, in blue and red respectively, is attached.

    • one year ago
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