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ln(x+1)=ln(x+3)-lnx?

asked Nov 13, 2014 in ALGEBRA 2 by anonymous

1 Answer

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The logarithmic equation ln(x + 1)= ln(x + 3) - ln(x)

{Apply quotient rule in logarithms ln(a) - ln(b) = ln(a/b)}

ln(x + 1) = ln[(x + 3)/x]

{Recall ln(a) =  ln(b) then a must equal to b}

x + 1 = (x + 3)/x

x(x + 1) = x + 3

x2 + x = x + 3

x2 = 3

Apply square root on each side.

Solution x = 1.7321.

answered Nov 13, 2014 by david Expert

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