In the table first find 83 for above example in first types of column then find the value under 7 for 83 in second kind of columns then find the value of 2 for 83 in the third kind of columns. Displaystyle log_ 2 left 13482right 70749 log2. To find log of any number.
Log of 100 is log of 10 2 and therefore is equal to 2.
Each log table is only usable with a certain base. Log 5 0699. The first entry to the right of 50 under the 0 column should be 6990. We will also discuss the common logarithm logx and the natural logarithm lnx.