document.write( "Question 841097: help me solve these please
\n" ); document.write( "approximate the folllowing logarithms to 3 d.p;
\n" ); document.write( "a)log base 2 23
\n" ); document.write( "2)log base3 32
\n" ); document.write( "3) 5 to the power2x - 7(5 to the power of x)+10=0
\n" ); document.write( "

Algebra.Com's Answer #506635 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "Note:\"log%28a%2C+%28p%29%29+=+log%28b%2Cp%29%2Flog%28b%2C+%28a%29%29+\"
\n" ); document.write( "\"log%282%2C+%2823%29%29+=+log%2810%2C23%29%2F+log%2810%2C+%282%29%29+\"
\n" ); document.write( "\"log%283%2C+%2832%29%29+=+log%2810%2C32%29%2F+log%2810%2C+%283%29%29+\"
\n" ); document.write( "3)\"+5%5E%282x%29-+7%285%5Ex%29+%2B+10+=+0\" Let \"y+=+5%5Ex\"
\n" ); document.write( " y^2 - 7y + 10 = 0
\n" ); document.write( " (y-5)(y-2) = 0, y = 5 0r y = 2
\n" ); document.write( "\"y+=+5%5Ex\"
\n" ); document.write( " log(5)/log(5) = x
\n" ); document.write( " log(2)/log(5) = x \n" ); document.write( "
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