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25 December, 10:53

What is the answer to 400 / (1+e^-x) = 350

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  1. 25 December, 14:46
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    400 / (1+e^-x) = 350

    400=350 (1+e^-x)

    400=350+350e^-x

    350e^-x=400-350

    350e^-x=50

    e^-x=50/350

    e^-x=1/7

    ln e^-x=ln (1/7)

    -x ^ (ln e) = ln1-ln7

    -x (1) = 0-ln7

    x=ln7

    Answer: x = ln 7 ≈1.94591 ...
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