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:
dx( sin (x 2 ) + 2 cos (x) )
1.Enter the differentiation function onto the command line, substituting S1 in place of X.
>GG[@>$/3+$@S1
>@>6,1@>$/3+$@S1 >[@ >@>@2 >[@ >&26@>$/3+$@S1 >@ >@
2.Evaluate the function.
>(17(5@
3.Show the result.
*k,6+2:_
HP 39G | HP 40G |
Using mathematical functions |