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Mathematics
27 May, 17:17
If lnx + ln (x-3) = ln (4x), then x=
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Jorden Vega
27 May, 17:29
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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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