Symbolic Manipulation 234
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.
Note: You may or may not want to define a numeric value for var, depending on the
situation.
For example:
solve(x^2NxN2=0,x)
d(x^2
NxN2,x)
‰(x^2NxN2,x)
limit(x
2
NxN2,x,5)
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