document.write( "Question 136596: How do I solver log2 4 - log2 16
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Algebra.Com's Answer #100037 by solver91311(24713)\"\" \"About 
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\"log%28b%2C%28a%29%29-log%28b%2C%28c%29%29=log%28b%2C%28a%2Fc%29%29\", so \r
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\n" ); document.write( "\n" ); document.write( "If \"y=log%28b%2Cx%29\", then \"b%5Ey=x\", so\r
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\n" ); document.write( "\n" ); document.write( "If \"y=log%282%2C%281%2F4%29%29\", then \"2%5Ey=1%2F4\", but \"1%2F4=1%2F%282%5E2%29=2%5E%28-2%29\" so \"y=-2\"
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