document.write( "Question 311598: Use the change of base formula to evaluate $\"log%282%2C17%29\"$ \n" ); document.write( "

Algebra.Com's Answer #222861 by Edwin McCravy(20060) $\"\"$ $\"About$

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Use the change of base formula to evaluate $\"log%282%2C17%29\"$
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document.write( "Change of base formula:\r\n" );
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document.write( "The  is 2 and the  is either 10 or e, take your pick:\r\n" );
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document.write( "If we pick 10 for the , then\r\n" );
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document.write( "becomes\r\n" );
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document.write( "When the base is 10 we don't write the 10 but leave it understood:\r\n" );
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document.write( "Then we cet a calculator and find those logarithms with the LOG key:\r\n" );
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document.write( "If we pick e for the , then\r\n" );
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document.write( "becomes\r\n" );
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document.write( "When the base is e we don't write  but write  instead:\r\n" );
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document.write( "Then we cet a calculator and find those natural logarithms with the LN key:\r\n" );
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document.write( "Notice that regardless of whether we picked 10 or e for the ,\r\n" );
document.write( "we ended up with the same answer.\r\n" );
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document.write( "Edwin

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