HP 39g Graphing Calculator Uživatelská příručka stáhnout pdf (Strana 159)

Using mathematical functions 10-23

Finding derivatives

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

derivatives in

HOME

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:

1. Enter the differentiation function onto the command line,

substituting S1 in place of X.

>GG[@>$/3+$@S1

>@>6,1@>$/3+$@S1

>[@ >@>@2 >[@

>&26@>$/3+$@S1

>@ >@

2. Evaluate the function.

>(17(5@

3. Show the result.

*k,

dx x(

)sin( 2 x())cos+

HP 39G

HP 40G

1 2 ... 154 155 156 157 158 159 160 161 162 163 164 ... 287 288

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HP 39g Graphing Calculator Uživatelská příručka Strana 159