Texas Instruments TI-89 Titanium User Manual page 254

Finding Proper Fractions and Common Denominators
Use the
propFrac
propFrac(rational expression
comDenom(expression
Find a proper fraction for the expression
4 2 2
(
x 2x + x) / (2x
N
Then transform the answer into a ratio of a
fully expanded numerator and a fully
expanded denominator.
Notice that
propFrac
opposite operations.
You can use
Note:
expression, list, or matrix.
In this example:
Symbolic Manipulation
(„ ) and
7 comDenom
[, ]
var )
[, ]
var )
for common denominators that collect
similar powers of this variable
.
+ x + 4)
and
comDenom
with an
comDenom
(„ ) functions.
6
for proper fractions with respect
to a variable
perform
If you do this example
on your handheld, the
propFrac function
scrolls off the top of the
screen.
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