E-21
Performing integral calculations
1. Press
F
.
2. Specify the following parameters: range of integral
(initial value (
a)
, end value (
b
)), function with
variable
x
, and number of subintervals (
n
).
You do not need to specify the number of
subintervals. If the number of subintervals is not
specifi ed, the default value of
n
= 100 will be used.
3. Press
=
.
2
8
(
x
2
−
5)
dx
j
F
2
u
8
r
;
X
A
&
5
n
=
100
=
138.
n
=
10
l
l
H
10
=
138.
o
j
F
;
X
A
&
5
H
2
H
8
)
=
138.
l
l
H
10
=
138.
−
−
1
1
(
x
2
−
1)
dx
+
1
3
(
x
2
−
1)
dx
=
S
F
S
1
u
1
r
;
X
A
&
1
r
+
F
1
u
3
r
;
X
A
&
1
=
8.
Notes:
• Parameters are entered in the following way:
WriteView editor:
a
b
function[, subintervals]
dx
Line editor:
(function,
a
,
b
[, subintervals])
• Integral calculations, depending on the integrands
and subintervals included, require longer calculation
time. During calculation, the
BUSY
symbol will be
displayed. To cancel calculation, press
j
.
Note that there will be greater integral errors when
there are large fl uctuations in the integral values
during minute shifting of the integral range and for
periodic functions, etc., where positive and negative
integral values exist depending on the interval.
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