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    Hi there,

    I am currently revising C3 and one thing I continuously get confused with is ln's and e's and all the general rules and rules for intergration and differentiation

    I was wondering if anyone could write a list of all the rules, I will list the ones I know for example:

    alnb = ln(b^a)

    dy/dx of ln1 = 1/x

    dy/dx of e^-x = -e^-x
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    ln(a)-ln(b)=ln(a/b)
    ln(a)+ln(b)=ln(a*b)
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    PS Helper
    (Original post by The0neAnd0nly)
    Hi there,

    I am currently revising C3 and one thing I continuously get confused with is ln's and e's and all the general rules and rules for intergration and differentiation

    I was wondering if anyone could write a list of all the rules, I will list the ones I know for example:

    alnb = ln(b^a)

    dy/dx of ln1 = 1/x

    dy/dx of e^-x = -e^-x
    The second rule you know - probably just a typing error but \frac{d}{dx}(ln1) = 0 since ln1 = 0 what I think you meant was  \frac{d}{dx}(lnx) = \frac{1}{x}

    I'm sure you knew that, just best to be safe

    \frac{d}{dx}(e^{ax}) = \frac{d}{dx}(ax) * e^{ax} by the chain rule. A more general formula for the third thing you said you knew.

    Surely there's a list in the text book?
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    http://www.rapidtables.com/math/alge...ithm_Rules.htm
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    Thanks guys and those tables are extremely helpful!

    @Theirattional yes I did mean lnx differentiates to 1/x, my mistake.
 
 
 
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Updated: January 1, 2013
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