Finding Derivatives - HP 40G User Manual

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Finding derivatives

To find
derivatives in
HOME
Using mathematical functions
manuals search engine
The HP 39G/40G can perform symbolic differentiation on
some functions. There are two ways of using the HP 39G/40G
to find derivatives.
• You can perform differentiations in HOME by using the
formal variables, S1 to S5.
• You can perform differentiations of functions of X in the
Function aplet.
To find the derivative of the function in HOME, use a formal
variable in place of X. If you use X, the differentiation
function substitutes the value that X holds, and returns a
numeric result.
For example, consider the function:
2
( x ( ) x ( ) )
dx sin + 2 cos
1. Enter the differentiation function onto the command line,
substituting S1 in place of X.
S1
S1
2
S1
2. Evaluate the function.
3. Show the result.
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HP 39G
HP 40G
10-23