Knowledge Base

Solution 11715: Calculating the Inverse Natural Log on the TI-89 Family, TI-92 Family or Voyage™ 200 Graphing Calculators.

How do I calculate the inverse natural log of a number on my TI-89 family, TI-92 family or Voyage 200 graphing calculator?

The examples listed below will display how to calculate the inverse natural log on the TI-89 family, TI-92 family or Voyage 200 graphing calculators.

Example 1: Find the inverse natural log of 1.60944

• Press [Green Diamond] [e^x][1][.][6][0][9][4][4][)] [Green Diamond][ENTER].

The answer 5.00001 will be displayed.

Example 2: Find the inverse natural log of 2.5

• Press [Green Diamond] [e^x][2][.][5] [)] [Green Diamond][ENTER].

The answer 12.1825 will be displayed.

Example 3: Find the inverse natural log of 1

• Press [Green Diamond] [e^x][1] [)] [Green Diamond][ENTER].

The answer 2.71828 will be displayed.