document.write( "Question 1135088: logbase4logx(base2) + logbase2logx(base4) = 2. Find x. \n" ); document.write( "
Algebra.Com's Answer #752634 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%29+%2B+log%282%2C%28log%284%2Cx%29%29%29+=+2\"\r
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\n" ); document.write( "\n" ); document.write( "Apply log rule : \"log+%28a%2Cb+%29=+log%28c%2Cb+%29%2Flog+%28c%2Ca+%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%282%2C%28log%284%2Cx%29%29%29=log%284%2C%28log%284%2Cx%29%29%29%2Flog%284%2C2%29\"\r
\n" ); document.write( "\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%29+%2Blog%284%2C%28log%284%2Cx%29%29%29%2Flog%284%2C2%29=2\"....simplify\r
\n" ); document.write( "\n" ); document.write( " \"log%284%2C%28log%284%2Cx%29%29%29%2Flog%284%2C2%29=2log%284%2C%28log%284%2Cx%29%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "so, you have\r
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\n" ); document.write( "\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%29+%2B2log%284%2C%28log%284%2Cx%29%29%29=2\"\r
\n" ); document.write( "\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%29+%2Blog%284%2C%28log%284%2Cx%29%29%5E2%29=2\"\r
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\n" ); document.write( "\n" ); document.write( "Apply log rule : \"log%28c%2Ca+%29%2Blog%28c%2Cb+%29=log%28c%2C%28ab%29%29\"\r
\n" ); document.write( "\n" ); document.write( "so
\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%2A%28log%284%2Cx%29%29%5E2%29=2\"\r
\n" ); document.write( "\n" ); document.write( "Apply log rule : \"a=log%28b%2Cb%5Ea%29\" and write \"2=log%284%2C4%5E2%29=log%284%2C16+%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%284%2C%28log%282%2Cx%29%29%2A%28log%284%2Cx%29%29%5E2%29=log%284%2C16+%29\"\r
\n" ); document.write( "\n" ); document.write( "When the logs have the same base: \"log+%28b%2Cf%28x%29%29=log%28b%2Cg%28x%29%29\"=>\"f%28x%29=g%28x%29\"\r
\n" ); document.write( "\n" ); document.write( "so\"log%282%2Cx%29%2A%28log%284%2Cx%29%29%5E2=16+\"\r
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\n" ); document.write( "\n" ); document.write( "write \"log+%282%2Cx%29\"as \"log+%284%2Cx%29%2Flog%284%2C2%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28log+%284%2Cx%29%2Flog%284%2C2%29%29%2A%28log%284%2Cx%29%29%5E2=16+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28log+%284%2Cx%29%29%5E3%2Flog%284%2C2%29=16+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28log+%284%2Cx%29%29%5E3%2F%281%2F2%29=16+\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%28log+%284%2Cx%29%29%5E3=16+\"\r
\n" ); document.write( "\n" ); document.write( "\"%28log+%284%2Cx%29%29%5E3=8+\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "For \"%28g+%28x+%29+%29%5En=f+%28a+%29\" when\"n\" is odd, the solution is :\"g%28x%29=root%28n%2Cf%28a%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"log+%284%2Cx%29=root%283%2C8%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"log+%284%2Cx%29=2+\"....change to base \"10\"\r
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\n" ); document.write( "\n" ); document.write( "\"log+%28x%29%2Flog+%284%29=2+\"\r
\n" ); document.write( "\n" ); document.write( "\"log+%28x%29=2log+%284%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"log+%28x%29=log+%284%5E2%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"log+%28x%29=log+%2816%29+\"...if log same,=>\r
\n" ); document.write( "\n" ); document.write( "\"x=16\"\r
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