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2 - Logarithms and antilogarithms
[lnx] - Natural logarithm key. It calculates the natural logarithm (base
e) of the displayed x value. x must be positive.
Example: ln 1.2 = 0.182321557
Enter
Press
1.2
[lnx]
x
[2nd] (e
) - Natural antilogarithm key. It calculates the natural
antilogarithm of the displayed x value. This sequence raises e to the
displayed power.
3.81
Example: e
= 45.15043887
Enter
Press
3.81
[2nd] (e
Note that it is not necessary to press the [=] key since the logarithm
function produces the result immediately.
[log] - Common logarithm key. It calculates the common logarithm (base
10) of the displayed x value. x must be positive.
Example: log 32.01 = 1.505285674
Enter
Press
32.01
[log]
x
[2nd] (10
) - Common antilogarithm key. It calculates the common
antilogarithm of the displayed x value. This sequence raises 10 to the
displayed power.
-7.12
Example: 10
Enter
Press
7.12
[+/-]
[2nd] (10
The results of logarithmic functions, when displayed in standard notation
and not in scientific notation, are accurate to within ± 1 unit of the
last displayed digit, accounting for rounding.
Display
0.182321557
Display
x
)
45.15043887
Display
1.505285674
= .000000076
Display
-7.12
x
)
0.000000076
17 -E
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