EXPONENTIAL FUNCTIONS Evaluating (Page 4 of 5)

The natural exponential function f(x) = e^x has a base of e, which is an irrational number. It also has a special key which is located over the LN key. key. Let's evaluate this function for x = 2.3. You do not need to enter the base first; the key will do that for you. Simply press the key, then enter the exponent.

 CLEAR key.

 2nd e to the x key. 2.3 Right parenthesis key. ENTER key.

 Calculator screen image.

To display the value of e itself, use the e symbol located above the Divide key. key.

 2nd e key. ENTER key. Calculator screen image.
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