document.write( "Question 133341: Find the unknown in the equation \r
\n" ); document.write( "\n" ); document.write( "log3(3^m+1 plus 3^m+2) = log3 972\r
\n" ); document.write( "\n" ); document.write( "Im am having trouble getting to the answer which is m = 4\r
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Algebra.Com's Answer #97528 by jim_thompson5910(35256)\"\" \"About 
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\"log%283%2C%283%5E%28m%2B1%29%2B3%5E%28m%2B2%29%29%29=+log%283%2C%28972%29%29\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( " Raise both sides as exponents with bases of 3. This will eliminate the logs\r
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\n" ); document.write( "\n" ); document.write( "\"3%5E%28m%2B1%29%2B3%5E%28m%2B2%29=+972\" Simplify\r
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\n" ); document.write( "\n" ); document.write( "\"3%5E%28m%29%2A3%5E%281%29%2B3%5E%28m%29%2A3%5E%282%29=+972\" Break up the left side using the identity \"x%5E%28y%2Bz%29=x%5Ey%2Ax%5Ez\"\r
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\n" ); document.write( "\n" ); document.write( "\"3%5E%28m%29%2A3%2B3%5E%28m%29%2A9=+972\" Evaluate \"3%5E1\" to get 3. Evaluate \"3%5E2\" to get 9\r
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\n" ); document.write( "\n" ); document.write( "\"3%2A3%5E%28m%29%281%2B3%29=+972\" Factor out the GCF\r
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\n" ); document.write( "\n" ); document.write( "\"3%2A3%5E%28m%29%284%29=+972\" Add\r
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\n" ); document.write( "\n" ); document.write( "\"3%2A3%5E%28m%29=+243\" Divide both sides by 4\r
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\n" ); document.write( "\n" ); document.write( "\"3%5E%28m%29=+81\" Divide both sides by 3\r
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\n" ); document.write( "\n" ); document.write( "\"3%5E%28m%29=+3%5E4\" Rewrite 81 as \"3%5E4\"\r
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\n" ); document.write( "\n" ); document.write( "Since the bases are equal, this means that the exponents are equal. So \"m=4\"\r
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\n" ); document.write( "\n" ); document.write( "So our answer is \"m=4\"
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