Casio ALGEBRA FX 2.0, User Manual

Page: 292 / 426

19990401
u
approx
Function: Produces a numerical approximation for an expression.
Syntax: approx Exp
Example To obtain a numerical value for 2
1
(TRNS)
l
(approx)
!x
( )
c w
1.414213562
k
About approx
Using approx affects the number of digits used to display a calculation result and the way
calculations that include variables are performed in the CAS Mode.
With normal calculations (when approx is not used) in the CAS Mode, calculation results are
displayed in full, without using exponents. When you use approx in the CAS Mode, however,
results are displayed using the exponential format range specified by the Display item of the
SET UP screen.
This means approx displays results in the CAS Mode the same way they are displayed in the
RUN
•
MAT Mode.
Example 920
Normal:
j M ca w
12157665459056928801
approx:
1
(TRNS)
l
(approx)
j M ca w
1. 21519 (Display: Norm1)
If you use approx to execute an expression that contains a variable, the value assigned to the
variable in general variable memory (variable memory recalled using RUN
•
MAT) is used for
the calculation.
Example 5A + 3, when A = 1.3
Normal:
f av
(A)
+d w
5A + 3
approx:
1
(TRNS)
l
(approx)
f av
(A)
+d w
9.5
7-1-11
Using the CAS (Computer Algebra System) Mode
# A Syntax ERROR occurs if a calculation is
performed in front of (to the left of) the approx
command.
Example: 1+approx( 2 ) ... Syntax ERROR