HP 40gs User Manual page 188

hp40g+.book Page 6 Friday, December 9, 2005 1:03 AM
Num. Factor mode
Complex vs. Real
mode
Verbose vs. non-
verbose mode
Step-by-step mode
Increasing-powers
mode
Rigorous setting
Simplify non-
rational setting
14-6
calculated as closed-form algebraic expressions,
whenever possible. [Default: unselected.]
When the setting is selected, approximate
NUM FACTOR
roots are used when factoring. For example,
is irreducible over the integers but has approximate roots
over the reals. With
NUM FACTOR
are returned. [Default: unselected.]
When is selected and an operation results in a
COMPLEX
complex number, the result will be shown in the form a +
bi or in the form of an ordered pair (a,b). If
is not selected and an operation results in a complex
number, you will be asked to switch to
you decline, the calculator will report an error. [Default:
unselected.]
When in mode, CAS is able to perform a wider
COMPLEX
range of operations than in non-complex (or real) mode,
but it will also be considerably slower. Thus, it is
recommended that you don't select
requested by the calculator in the performance of a
particular operation.
When is selected, certain calculus applications
VERBOSE
are provided with comment lines in the main display. The
comment lines will appear in the top lines of the display,
but only while the operation is being calculated. [Default:
unselected.]
When is selected, certain operations will be
STEP/STEP
shown one step at a time in the display. You press
to show each step in turn. [Default: selected.]
When is selected, polynomials will be listed so
INCR POW
that the terms will have increasing powers of the
independent variable (which is the opposite to how
polynomials are normally written). [Default: unselected.]
When is selected, any algebraic expression of
RIGOROUS
the form |X|, i.e., the absolute value of X, is not
simplified to X. [Default: selected.]
When is selected, non-rational
SIMP NON-RATIONAL
expressions will be automatically simplified. [Default:
selected.]
5
x + 5x + 1
set, the approximate roots
mode
COMPLEX
mode. If
COMPLEX
mode unless
COMPLEX
Computer Algebra System (CAS)