document.write( "Question 698001: I'm in Algebra 2 and this is my first year learning Logarithms.. I don't understand how to use the proerties of lag. to evaluate a problem..\r
\n" ); document.write( "\n" ); document.write( "example \" log3^9 + log3^36 - log3^4
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Algebra.Com's Answer #430412 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
\"+log%283%5E9%29+%2B+log%283%5E36%29+-+log%283%5E4%29+\"
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\n" ); document.write( "You need to follow 2 general rules to simplify this
\n" ); document.write( "\"+log%28a%29+%2B+log%28b%29+-+log%28c%29+=+log%28+%28a%2Ab%29%2Fc+%29+\"
\n" ); document.write( "and
\n" ); document.write( "\"+log%28+a%5Eb+%29+=+b%2Alog%28a%29+\"
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\n" ); document.write( "\"+9%2Alog%283%29+%2B+36%2Alog%283%29+-+4%2Alog%283%29++\"
\n" ); document.write( "\"+log%283%29+\" is a common factor which I can factor out
\n" ); document.write( "\"+log%283%29%2A%28+9+%2B+36+-+4+%29+\"
\n" ); document.write( "\"+41%2Alog%283%29+\"
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\n" ); document.write( "Note that if the base is not specified, it is assumed that
\n" ); document.write( "the base of the log is \"+10+\".
\n" ); document.write( "Actually, any base is possible to use here, and \"+3+\" is the best.
\n" ); document.write( "\"+log%283%2C3%5E9%29+%2B+log%283%2C3%5E36%29+-+log%283%2C3%5E4%29+=+9+%2B+36+-+4+\"
\n" ); document.write( "\"+41+\" This matches the answer
\n" ); document.write( "\"+41%2Alog%283%2C3%29+=+41+\"
\n" ); document.write( "Note that \"+log%28a%2Ca%29+=+1+\" always
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\n" ); document.write( "The main thing to remember is
\n" ); document.write( "\" logs are exponents \" and you read something like
\n" ); document.write( "\"+log%285%2C11%29+\" as: This is the exponent that I raise \"+5+\" to
\n" ); document.write( "and the result is \"+11+\".
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\n" ); document.write( "\"+log%282%2C2%29+\" says: This is the exponent that I raise \"+2+\" to
\n" ); document.write( "in order to get \"+2+\" ( obviously it is \"+1\" ) , so
\n" ); document.write( "\"+log%282%2C2%29+=+1+\"
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\n" ); document.write( "Hope this helps. I have to keep reminding myself how logs
\n" ); document.write( "work to keep it straight. Keep going back to the general
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\n" ); document.write( "Write exponents out the long way , too
\n" ); document.write( "\"+5%5E7+=+5%2A5%2A5%2A5%2A5%2A5%2A5+\"
\n" ); document.write( "\"+5%5E7+=+%285%2A5%2A5%29%2A%285%2A5%2A5%29%2A5+\"
\n" ); document.write( "\"+5%5E7+=+5%5E3%2A5%5E3%2A5%5E1+\"
\n" ); document.write( "\"+5%5E7+=+5%5E%28+3+%2B+3+%2B+1+%29+\"
\n" ); document.write( "And on and on . . .\r
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