document.write( "Question 71077: I have a work sheet w/ some natural logs that I need help with.\r
\n" ); document.write( "\n" ); document.write( "e^x * e^(3x) = 4\r
\n" ); document.write( "\n" ); document.write( "e^9 = (e^x)^3 (1/e^9)\r
\n" ); document.write( "\n" ); document.write( "Thank you so much!
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Algebra.Com's Answer #50800 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
1) Solve for x:
\n" ); document.write( "\"%28e%5Ex%29%28e%5E%283x%29%29+=+4\" Take the natural log of both sides.
\n" ); document.write( "\"ln%28%28e%5Ex%29%28e%5E%283x%29%29%29+=+ln%284%29\" Apply the product rule for logarithms to the left side.
\n" ); document.write( "\"ln%28e%5Ex%29+%2B+ln%28e%5E%283x%29%29+=+ln%284%29\" But \"ln%28e%5Ex%29+=+x\"
\n" ); document.write( "\"x+%2B+3x+=+ln%284%29\" Simplify.
\n" ); document.write( "\"4x+=+ln%284%29\" Divide both sides by 4.
\n" ); document.write( "\"x+=+%281%2F4%29ln%284%29\" Evaluate using your calculator or log tables.
\n" ); document.write( "\"x+=+0.3466\" Approximately.\r
\n" ); document.write( "\n" ); document.write( "2) Solve for x:
\n" ); document.write( "\"e%5E9+=+%28%28e%5Ex%29%5E3%29%281%2Fe%5E9%29\" Multiply both sides by \"e%5E9\"
\n" ); document.write( "\"%28e%5E9%29%28e%5E9%29+=+%28e%5Ex%29%5E3\" Simplify both sides.
\n" ); document.write( "\"e%5E18+=+e%5E%283x%29\" Take the natural log of both sides.
\n" ); document.write( "\"ln%28e%5E18%29+=+ln%28e%5E%283x%29%29\"
\n" ); document.write( "\"18+=+3x\" Divide both sides by 3.
\n" ); document.write( "\"x+=+6\"
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