HP 40gs - Manual (Page 176)

13-22 Using mathematical functions
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.
S1
S1
2
S1
2. Evaluate the function.
3. Show the result.
To find derivatives
in the Function
aplet’s Symbolic
view To find the derivative of the function in the Function aplet’s
Symbolic view, you define two functions and define the
second function as a derivative of the first function. For
example, to differentiate
:
1. Access the Function aplet’s Symbolic view and define
F1.
2
2. Define F2( X) as the
derivative of F(1).
dx x ( 2 ) sin ( 2 x ( ) ) cos +
x
2 ( ) sin 2 x cos +
hp40g+.book Page 22 Friday, December 9, 2005 1:03 AM