Texas Instruments TI-89 Titanium User Manual page 775

comDenom(
numerator and denominator expanded with respect to
. The terms and their factors are sorted with
var
the main variable. Similar powers of
There might be some incidental factoring of the
collected coefficients. Compared to omitting
often saves time, memory, and screen space, while
making the expression more comprehensible. It also
makes subsequent operations on the result faster and
less likely to exhaust memory.
If does not occur in
var
comDenom(
an unexpanded numerator over an unexpanded
denominator. Such results usually save even more
time, memory, and screen space. Such partially
factored results also make subsequent operations on
the result much faster and much less likely to exhaust
memory.
Even when there is no denominator, the
function is often a fast way to achieve partial
factorization if
memory.
Hint: Enter this
routinely try it as an alternative to
.
factor()
conj()
MATH/Complex menu
) ⇒
expression1
conj(
) ⇒
list1 list
conj(
) ⇒
matrix1
conj(
Returns the complex conjugate of the argument.
Note: All undefined variables are treated as real
variables.
CopyVar
CATALOG
var1 var2
CopyVar ,
Copies the contents of variable
does not exist,
Note:
CopyVar
(! ) when you are copying an expression, list,
matrix, or character string except that no
simplification takes place when using
You must use
types such as Pic and GDB variables.
772
returns a reduced ratio of
expression1,var
)
are collected.
var
,
expression1
returns a reduced ratio of
expression1,var
)
is too slow or if it exhausts
factor()
function definition and
comden()
comDenom()
expression
matrix
to
var1 var2.
creates it.
CopyVar
is similar to the store instruction
CopyVar
with non-algebraic variable
CopyVar
comDenom((y^2+y)/(x+1)
^2+y^2+y,x) ¸
as
var
, this
var
comDenom((y^2+y)/(x+1)
^2+y^2+y,y) ¸
comDenom(exprn,abc)!comden
(exprn) ¸
comden((y^2+y)/(x+1)^2+y^2+y)
¸
comden(1234x^2ù (y^3ì y)+2468x
comden
ù (y^2ì 1)) ¸
1234ø xø (xø y + 2)ø (yñ ì 1)
and
i ) ¸
conj(1+2
conj([2,1ì 3
conj(z)
i
conj(x+ y)
x+y! a ¸
10! x ¸
If
var2
CopyVar a,b ¸
a! c ¸
DelVar x ¸
b ¸
c ¸
.
Appendix A: Functions and Instructions
Done
1 ì 2ø
,ë 7]) ¸
i ;ë i

2 1+3ø i

ë 7
i
x + ë i
x + y
Done
y + 10
Done
x + y
y + 10
i


z
ø y
10