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Math Help - differentiation

  1. #1
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    differentiation

    differentiate the following function with respect to x

    ln(3x-1)

    thanks
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  2. #2
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    Recall that:
    \frac{d}{dx} \ln{x} = \frac{1}{x}

    \frac{d}{dx}\ln{(3x-1)} = \frac{1}{3x-1} \cdot 3 = \frac{3}{3x-1}
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  3. #3
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    ahhh yes i remember now thanks, what about sin5x ?
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  4. #4
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    actually, on the previous reply, why do you times it by 3?
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  5. #5
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    \frac{d}{dx}\sin{x} = \cos{x}

    \frac{d}{dx}\sin{5x} = 5\cos{5x}
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  6. #6
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    Quote Originally Posted by djmccabie View Post
    actually, on the previous reply, why do you times it by 3?
    Because you have to apply the chain rule.
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  7. #7
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    thanks dude, ask some silly questions when i type before i think =]
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