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27 November, 13:49

If lnx + ln (x-3) = ln (4x), then x=

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  1. 27 November, 16:05
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    x=7

    Step-by-step explanation:

    ln (x) + ln (x-3) = ln (4x)

    x≥0, x≥3

    combining x≥3

    ln[x (x-3) ]=ln (4x)

    x (x-3) = 4x

    x²-3x-4x=0

    x²-7x=0

    x (x-7) = 0

    x=0 (rejected),7
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