Logarithms and Antilogarithms - SmartData
Logarithms and Antilogarithms - SmartData
Logarithms and Antilogarithms - SmartData
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<strong>Logarithms</strong> <strong>and</strong> <strong>Antilogarithms</strong> 15<br />
Keys<br />
These numbered paragraphs provide<br />
explanations for the corresponding numbered<br />
keys on the illustration below.<br />
1. % A displays a menu of all log<br />
functions.<br />
Notes<br />
• The examples on the transparency<br />
masters assume all default settings.<br />
• E ends a logarithmic function.<br />
log calculates the common logarithm<br />
(base 10).<br />
10^ calculates the common antilogarithm<br />
(10 raised to the power of the value<br />
entered).<br />
ln calculates the natural logarithm (base<br />
e, where e = 2.718281828459).<br />
e^ calculates the natural antilogarithm (e<br />
raised to the power of the value).<br />
1<br />
© 1999 TEXAS INSTRUMENTS INCORPORATED TI-34 Û: A Guide for Teachers 104
Common Logarithm,<br />
Natural Logarithm<br />
%›<br />
Find log 23 rounded to 4 decimal<br />
places. Then find ln 23 rounded to<br />
4 decimal places <strong>and</strong> return to<br />
floating decimal notation.<br />
Press<br />
%› 23<br />
E <<br />
Display<br />
log(23) º<br />
1.361727836<br />
%ª F0123456789<br />
-<br />
4 log(23) º<br />
%› ""<br />
23 E <<br />
FIX<br />
1.3617<br />
ln(23) º<br />
3.1355<br />
%ª 8 ln(23) º<br />
3.135494216<br />
FIX<br />
© 1999 TEXAS INSTRUMENTS INCORPORATED TI-34 Û: A Guide for Teachers 105
Common Antilogarithm,<br />
Natural Antilogarithm<br />
%›<br />
Find the antilogarithm of 3.9824<br />
rounded to 4 decimal places. Then<br />
find the natural antilogarithm of<br />
3.9824 rounded to 4 decimal<br />
places. When finished, return to<br />
floating decimal notation.<br />
Press<br />
%› "<br />
3 8 9824<br />
E<<br />
Display<br />
10^(3.9824) º<br />
9602.846792<br />
%ª F0123456789<br />
-<br />
4 10^(3.9824) º<br />
%› !<br />
3 8 9824<br />
E<<br />
FIX<br />
9602.8468<br />
e^(3.9824) º<br />
53.6456<br />
%ª 8 e^(3.9824) º<br />
53.64562936<br />
FIX<br />
© 1999 TEXAS INSTRUMENTS INCORPORATED TI-34 Û: A Guide for Teachers 106
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