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Math Help - Solve For the Unknown (ln equation)

  1. #1
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    Solve For the Unknown (ln equation)

    A. 2ln2x=8
    B. 2e^2x-3e^x=-1
    C. 6e^-5x+13=15

    I have no clue how to solve any of these, since I missed a pre-cal class and when you miss a pre-cal class.. Things hit the fan. Could anyone offer an explanation?
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  2. #2
    Master Of Puppets
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    Re: Solve For the Unknown (ln equation)

    For the first one, divide both sides by 2, then take both sides to the power of e.

    For the second make u= e^x, then solve the resulting quadratic.

    For the third take 13 from both sides, divide both sides by 6 and then take the ln of both sides.

    what do you get?
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