Maeckes logo

fx-82MS      fx-9860GII


ln

On a Casio calculator you can calculate natural logarithms

ln

or via the CATALOG as

 ln 

 


Example 1

To calculate ln (1) = 0

ln  1  EXE ln 1
0

 


Example 2

To calculate ln (e) = 1

e x C
ln SHIFT ln  1  EXE ln e1
1

 


Example 3

To calculate ln (e2) = 2 × ln (e) = 2 × 1 = 2

e x C
ln SHIFT ln  2  EXE ln e2
2

 


Example 4

To calculate ln (√7) = 0.97295...

   r
ln SHIFT x²  7  EXE ln √7
0.9729550745

and also ln (√7) = ½ ln (7) = 0.97295...

 1  a b/c  2   ▷  ln  7  EXE ln(7
0.9729550745

 


Example 5

To calculate eln (7) = 7

e x C
SHIFT ln ln  7  EXE eln 7
7

and this demonstrates the definition of the logarithm.

 


Details

The functions ln and ex are on the same key. This makes sense because these functions all deal with the number e.

 


Deutsch   Español   Français   Nederlands   中文   Русский