Texas Instruments TITANIUM TI-89 - Manual (Page 249)

Symbolic Manipulation 249
Substituting Values and Setting Constraints Substituting Values and Setting Constraints Substituting Values and Setting Constraints Substituting Values and Setting Constraints
The “ with ” operator ( | ) lets you temporarily substitute values into an expression or
specify domain constraints.
Typing the “With” Operator Typing the “With” Operator Typing the “With” Operator Typing the “With” Operator
To type the “ with ” operator ( | ), press:
@
Í
Substituting for a Variable Substituting for a Variable Substituting for a Variable Substituting for a Variable
For every occurrence of a specified variable,
you can substitute a numeric value or an
expression.
To substitute for multiple variables at the
same time, use the Boolean and operator.
First derivative of x
3
at x = 5