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Symbolic Manipulation 247

Delayed Simplification for Certain Built-In Functions

Delayed Simplification for Certain Built-In FunctionsDelayed Simplification for Certain Built-In Functions

Delayed Simplification for Certain Built-In Functions

Usually, variables are automatically simplified to their lowest possible level before they

are passed to a function. For certain functions, however, complete simplification is

delayed until after the function is performed.

Functions that Use Delayed Simplification

Functions that Use Delayed SimplificationFunctions that Use Delayed Simplification

Functions that Use Delayed Simplification

Functions that use delayed simplification have a required var argument that performs the

function with respect to a variable. These functions have at least two arguments with the

general form:

function(expression, var [, ... ])

Note:

Not all functions that use a var argument use delayed simplification.

For a function that uses delayed simplification:

1. The

var variable is simplified to the lowest level at which it remains a variable (even if

it could be further simplified to a non-variable value).

2. The function is performed using the variable.

3. If

var can be further simplified, that value is then substituted into the result.

For example:

solve(x^2NxN2=0,x)

d(x^2

NxN2,x)

‰(x^2NxN2,x)

limit(x

NxN2,x,5)

Texas Instruments Titanium TI-89 User Manual

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