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Math Help - Please Check my Differentiation:

  1. #1
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    Please Check my Differentiation:

    I posted my work through the link:


    http://item.slide.com/r/1/69/i/n4WqH...TvkwusSnlBSFG/

    He does not want us to simplify the answer.

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  2. #2
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    Hello, qbkr21!

    I didn't go through all your steps . . . ack!

    . . . . . . . . . . . . . . _ . . . .5
    Given: . f(x) .= .4x√x + ------ .= .4x^{3/2) + 5x^{-3/2}
    . . . . . . . . . . . . . . . . . x√x


    Then: . f'(x) .= .6x^{1/2} - (15/2)x^{-5/2}

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  3. #3
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    But in your spare time sir could you just look over them. Dr. W doesn't want me using the differentiate button on my calculator. He says that's cheating. My professor just wants us to drop the equation into the formula then move on. In this case Soroban multiple formula's (Product Rule, Quotient Rule, Product Rule)...
    Last edited by qbkr21; March 9th 2007 at 03:59 PM.
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  4. #4
    Forum Admin topsquark's Avatar
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    They look good to me. (You might want to write your answers a bit neater though.)

    -Dan
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  5. #5
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    Hello, qbkr21!

    What part of my explanation don't you understand?


    Dr. W doesn't want me using the differentiate button on my calculator.
    Does it look like I just pressed a button?
    . . Did I type all that Algebra and Calculus for nothing?


    I'm worried about Dr W . . .

    . . . . . . . . . . . . . . . . . . (x)
    If he gave you: . f(x) .= .-------
    . . . . . . . . . . . . . . . . . . . x

    would he expect you to use the Quotient Rule and Chain Rule?
    . . (and "don't simplify"?)

    or are you allowed to simplify first?

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  6. #6
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    Simplify or not, it's the same.

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