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13 November, 20:58

E^2x + 3e^x - 18 = 0

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  1. 13 November, 21:08
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    Let e^x = a

    a^2 + 3a - 18 = 0

    (a - 3) (a + 6) = 0

    a = 3, - 6

    e^x = 3, - 6 (rejected as - 6 <0)

    x = ln3
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