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Yahoo!

  • 3 years ago

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

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  1. Yahoo!
    • 3 years ago
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    9 x^2 + 6x + 11 should be minimum

  2. mukushla
    • 3 years ago
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    take derivative

  3. Yahoo!
    • 3 years ago
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    I dont think so

  4. waterineyes
    • 3 years ago
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    You should take derivative first..

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

  6. Yahoo!
    • 3 years ago
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    18 x + 6

  7. mukushla
    • 3 years ago
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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

  8. Yahoo!
    • 3 years ago
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    hw u got x = -2

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

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

  11. Yahoo!
    • 3 years ago
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    got it thxxx

  12. Pac1f1cIslander
    • 3 years ago
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    Why was I sent this in a message? xD

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

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