document.write( "Question 737110: Write 1 - 2log7x as a single logarithm. \n" ); document.write( "

Algebra.Com's Answer #450171 by josgarithmetic(39625) $\"\"$ $\"About$

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What base? Assuming base 10, or any base, $\"log%2810%2C+10%29=1\"$ , because $\"10%5E1=10\"$ . \r
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\n" ); document.write( "\n" ); document.write( "Assuming any base, b:
\n" ); document.write( " $\"1-2%2Alog%28b%2C7x%29=log%28b%2Cb%29-2%2Alog%28b%2C7x%29\"$
\n" ); document.write( "= $\"log%28b%2Cb%29-log%28b%2C%287x%29%5E2%29\"$
\n" ); document.write( "= $\"highlight%28log%28b%2C%28%28b%29%2F%287x%29%5E2%29%29%29\"$ \n" ); document.write( "

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