document.write( "Question 111760: find the value of the expression
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\n" ); document.write( " 5
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Algebra.Com's Answer #81539 by jim_thompson5910(35256)\"\" \"About 
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\"log%285%2C%281%2F625%29%29\" Start with the given expression\r
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\n" ); document.write( "\n" ); document.write( "\"log%285%2C%285%5E%28-4%29%29%29\" Rewrite \"1%2F625\" as \"5%5E%28-4%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"-4%2Alog%285%2C%285%29%29\" Use the identity \"log%28b%2C%28x%5Ey%29%29=y%2Alog%28b%2C%28x%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"-4%2A1\" Now evaluate \"log%285%2C%285%29%29\" Remember \"log%28x%2C%28x%29%29=1\"\r
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\n" ); document.write( "\n" ); document.write( "\"-4\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "So \"log%285%2C%281%2F625%29%29=-4\"
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