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Thread: Calculus Help

  1. #31
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    Quote Originally Posted by man 430gt
    That just hurts...
    if only my 5th engineeirng degree stuff was this inviting, this is the fun bit!
    autozine.org

  2. #32
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    I think he mean he wants each step broken down.
    I don't see how that will help you blingbling unless somebody explains it all you.
    Audi humbles Porsche. A new dawn starts today.

    Being nice since 2007.

  3. #33
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    Quote Originally Posted by Vaigra
    I think he mean he wants each step broken down.
    I don't see how that will help you blingbling unless somebody explains it all you.
    Leave it man, I'm too bloody tired to try and commit my self to anything mathematical...
    .................................................................................:¦Back Again¦:.................................................................................

  4. #34
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    Quote Originally Posted by jediali
    hope this is clearer
    if there is stuff you can't understand here, then you might need to look back on notes, we cant teach you all about differentiation, there is no quick solution. sorry to be a bummer if am, you are welcome to ask me/us individual questions like "how to derive an exponential function on its own".or tell us Where is it you struggle? best of luck
    autozine.org

  5. #35
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    I remember doing all that and being very good at it. 2 years without maths of any sort and I REALLY need to refresh, thanks for the thread
    Audi humbles Porsche. A new dawn starts today.

    Being nice since 2007.

  6. #36
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    hope this helps. finally having a tablet comes in handy. just in case you don't trust me, mathematica's answer is attached too.
    Attached Images Attached Images

  7. #37
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    Quote Originally Posted by Bob
    looking at that, i might not have done the derivative of e^u correctly. but i think i did. one of us is wrong.
    Your first derivative is the correct one.

    However, is the second derivative correct? The first two components look right but the third doesn't (looking at the non-simplified form).

    Should it be:

    (2/x^2)e^(-1/x^2)(2/x^2)

    or

    (2/x^3)e^(-1/x^2)(2/x^2)
    "In theory, theory and practice are the same. In practice, they are not."

  8. #38
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    Wow I am so glad I never have to take a Math course again. EvAr!!!!
    John says:
    so i had to dump acid into the block tank today
    i'm afraid to fap
    cause i got it on my hands

  9. #39
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    maths is funnnn
    autozine.org

  10. #40
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    Quote Originally Posted by jediali
    maths is funnnn
    Going to the strip club is fun. Math isn't.
    John says:
    so i had to dump acid into the block tank today
    i'm afraid to fap
    cause i got it on my hands

  11. #41
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    Quote Originally Posted by baddabang
    Going to the strip club is fun. Math isn't.
    Math is fun when you calculate stuff on engine and valves and those kind of stuff Otherwise it is boring,difficult and annoying

  12. #42
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    Quote Originally Posted by drakkie
    Math is fun when you calculate stuff on engine and valves and those kind of stuff Otherwise it is boring,difficult and annoying
    that is what makes an engineering course more fun and useful than a maths course
    autozine.org

  13. #43
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    Quote Originally Posted by Alastor
    Your first derivative is the correct one.

    However, is the second derivative correct? The first two components look right but the third doesn't (looking at the non-simplified form).

    Should it be:

    (2/x^2)e^(-1/x^2)(2/x^2)

    or

    (2/x^3)e^(-1/x^2)(2/x^2)
    Yes i did this quickly it goes like you said and the final answer comes out
    ((-2/x^3)+(4/x^5))e^(-1/x^2)
    which is correct its the same answer given by mathematica in someone else's post. In my hurry to be done i didn't check my exponenets.

  14. #44
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    Quote Originally Posted by jediali
    hope this is clearer
    Your derivation of e^u is wrong.

    d/dx e^u = u'e^(u)

    you have it as

    d/dx e^u = e^(u')

  15. #45
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    Quote Originally Posted by jediali
    that is what makes an engineering course more fun and useful than a maths course
    Agreed and I hate it when math teachers say just do math for the sake of math (even though I do like it). It is supposed to be a tool and applications in the real world are most important.

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