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ln

On a Casio calculator you can calculate natural logarithms

ln

 


Example 1

To calculate ln (1) = 0

ln  1  =  ln 1
           0.

 


Example 2

To calculate ln (e) = 1

ln        ln =  ln e
           1.

 


Example 3

To calculate ln (e2) = 2

ln        ln  2  =  ln e2
           2.

 


Example 4

To calculate ln (√7) = 0,97295...

ln  7  = ln(√7        
0.972955074    

because ln (√7) = ½ ln (7) = 0,97295...

 1  a b/c  2  ln  7  = 12ln(√7     
0.972955074    

 


Example 5

To calculate eln (7) = 7

       ln ln  7  =  eln 7
                7.   

and this demonstrates the definition of the logarithm.

 


Details

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

 


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