document.write( "Question 71142: I need help with a natural log equation:\r
\n" ); document.write( "\n" ); document.write( "4ln x - ln 2 = ln 128 (I know the answer is 4, can you show me the steps)\r
\n" ); document.write( "\n" ); document.write( "Thanks
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Algebra.Com's Answer #50864 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
Solve for x:
\n" ); document.write( "\"4ln%28x%29-ln%282%29+=+ln%28128%29\" Apply the power rule \"n%2Aln%28x%29+=+ln%28x%5En%29\" to the first term:
\n" ); document.write( "\"ln%28x%5E4%29-ln%282%29+=+ln%28128%29\" Now apply the quotient rule for logarithms to the left side.
\n" ); document.write( "\"ln%28x%5E4%2F2%29+=+ln%28128%29\" Remembering that If\"M+=+N\"then\"ln%28M%29+=+ln%28N%29\", you can write:
\n" ); document.write( "\"%28x%5E4%29%2F2+=+128\" Multiply both sides by 2.
\n" ); document.write( "\"x%5E4+=+256\" Take the 4th root of both sides.
\n" ); document.write( "\"x+=+4\"
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