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Help on a question geometry
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Aug 10, 2015
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Help on a question geometry
Mathematics
high-school
Rann
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Listboss
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Aug 13, 2015
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2log 3 = log 3^2 = log 9 ;
log 5 + 2log 3 = log 5 + log 9 = log( 5 * 9 ) = log 45 ;
log ( x - 12 ) = log 45;
x - 12 = 45 ;
x = 12 + 45 ;
x = 57 ;
But, x - 12 > 0;
And, 57 - 12 > 0 ;
The solution is 57 .
Vovkas
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Aug 17, 2015
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