In addition to the three most popular logarithmic functions introduced earlier one can also define logarithm using other valid bases as well. Or the base-2 log of 8 is 3. Log 7 x 2 log 7 x 3 log 7 14.
For example the distance to the nearest star Proxima Centauri measured in kilometers is 40 113 497 200 000 kilometers.
The logarithm of a positive real number can be negative zero or positive. 3 2 9 log 3 9 2. For example the distance to the nearest star Proxima Centauri measured in kilometers is 40 113 497 200 000 kilometers. This is a set of 9-column known as the mean difference which can be found written above the columns.