document.write( "Question 739606: log(1.00417) how to see in the log table ? \n" ); document.write( "
Algebra.Com's Answer #451213 by KMST(5328)\"\" \"About 
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I have not seen a log tables book in the last 40 years.
\n" ); document.write( "I found an easy to read one at http://www.sosmath.com/tables/logtable/logtable.html
\n" ); document.write( "That table said that:
\n" ); document.write( "\"log%281.004%29=0.00173371\" and log(1.005)=0.00216606}}}
\n" ); document.write( "To find an approximation of the log for numbers in between, we do \"highlight%28interpolation%29\".
\n" ); document.write( "Interpolation is the calculation of the approximate value of a function in between two known values, assuming that a straight line is a good approximation.
\n" ); document.write( "
\n" ); document.write( "USING LINEAR FUNCTIONS DEFINITIONS:
\n" ); document.write( "The slope of the line would be
\n" ); document.write( "\"%28.00216606-0.00173371%29%2F%281.005-1.004%29=.00043235%2F0.001=0.43235\"
\n" ); document.write( "The equation of the line would be
\n" ); document.write( "\"log%28x%29-0.00173371=0.43235%2A%28x-1.004%29\" (a point slope form of the equation)
\n" ); document.write( "or the equivalent \"log%28x%29=0.00173371%2B0.43235%2A%28x-1.004%29\"
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\n" ); document.write( "Reading those logs in other tables may get a lot more complicated.
\n" ); document.write( "
\n" ); document.write( "NOT MENTIONING LINEAR FUNCTIONS:
\n" ); document.write( "We are assuming that the increase in the log is proportional to the increase in the number.
\n" ); document.write( "We know the ratio for the increases in the points from the table:
\n" ); document.write( "\"%28.00216606-0.00173371%29%2F%281.005-1.004%29=.00043235%2F0.001\"
\n" ); document.write( "The increase between \"log%281.004%29\" and \"%7Blog%281.00417%29\" will be proportional, so
\n" ); document.write( "\"%28log%281.00417%29-0.00173371%29%2F%281.00417-1.004%29=.00043235%2F0.001\"
\n" ); document.write( "\"%28log%281.00417%29-0.00173371%29%2F.00417=.00043235%2F0.001\"
\n" ); document.write( "\"%28log%281.00417%29-0.00173371%29=%28.00043235%2F0.001%29%2A0.00017\"
\n" ); document.write( "\"%28log%281.00417%29-0.00173371%29=0.00007350\"
\n" ); document.write( "\"log%281.00417%29=0.00173371%2B0.00007350=0.00180721\"
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