document.write( "Question 603512: lnx+ln(x+1)=2 I must solve for x, I keep coming across problems like this and also 3logx-log2x=2 and never really remember how to solve them. \n" ); document.write( "

Algebra.Com's Answer #380733 by stanbon(75887) $\"\"$ $\"About$

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lnx+ln(x+1)=2 I must solve for x, I keep coming across problems like this and also 3logx-log2x=2 and never really remember how to solve them.
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\n" ); document.write( "ln(x) + ln(x+1) = 2
\n" ); document.write( "---
\n" ); document.write( "ln(x(x+1)) = 2
\n" ); document.write( "x^2+x = e^2
\n" ); document.write( "x^2+x-e^2 = 0
\n" ); document.write( "=================
\n" ); document.write( "Use the Quadratic Formula to solve.
\n" ); document.write( "=================================================
\n" ); document.write( "3logx-log2x=2
\n" ); document.write( "log(x^3)-[log2x] = 2
\n" ); document.write( "------
\n" ); document.write( "log[x^3/(2x)] = 2
\n" ); document.write( "log[x^2/2] = 2
\n" ); document.write( "---
\n" ); document.write( "x^2/2 = 100
\n" ); document.write( "x^2 = 200
\n" ); document.write( "x = 10*sqrt(2)
\n" ); document.write( "==================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "==================
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