document.write( "Question 1133146: Y=[15e^(-x)]/[x+e^(-2x)]
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Algebra.Com's Answer #750343 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
\"y=%2815e%5E%28-x%29%29%2F%28x%2Be%5E%28-2x%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y=%2815%281%2Fe%5Ex%29%29%2F%28x%2B1%2Fe%5E%282x%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y=%2815%2Fe%5Ex%29%2F%28%28x%2Ae%5E%282x%29%2B1%29%2Fe%5E%282x%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y=%2815e%5E%282x%29%29%2F%28x%2Ae%5Ex%2A%28e%5E%282x%29%2B1%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"y=%2815e%5Ex%29%2F%28%28x%2Ae%5E%282x%29%2B1%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Solve \"dy%2Fdx+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28dy%2Fdx%29%28%2815e%5Ex%29%2F%28x%2Ae%5E%282+x%29+%2B+1%29%29\" = > first take the constant out\r
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\n" ); document.write( "\n" ); document.write( "Apply the Quotient Rule: \"f%2Fg\"'=(\"f\"'*\"g\"-\"g\"'*\"+f\")/\"g%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "Apply the common derivative:\r
\n" ); document.write( "\n" ); document.write( "\"%28d%2Fdx%29e%5Ex=e%5Ex\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28d%2Fdx%29%28xe%5E%282x%29%2B1%29=e%5E%282x%29%2B2e%5E%282x%29%2Ax\"\r
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\n" ); document.write( "\n" ); document.write( "simplify: \r
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\n" ); document.write( "\n" ); document.write( "since \r
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