39
• To exit the differential function, press
j
.
• After getting the answer, press
e
to return to the display for inputting
the
x
value and the minute interval, and press
@
h
to recalculate
at any point.
* X memory is specified by pressing
;
then the
3
key.
Integral function
The Integral function is used as follows.
1.
Press
b
0
to enter the NORMAL mode.
2.
Input a formula with an
x
variable.
3.
Press
{
.
4.
Input the starting value (a) of a range of integral and press
e
.
5.
Input the finishing value (b) of a range of integral and press
e
.
6.
Input the subinterval (n).
7.
Press
e
to calculate.
• To exit the integral function, press
j
.
• After getting the answer, press
e
to return to the display for inputting
a range of integral and subinterval, and press
@
h
to recalculate
at any point.
Chapter 3: Scientific Calculations
Example
Key operations
Result
d/dx
(
x
4
–0.5
x
3
+6
x
2
)
j
;
X*
m
4
-
0.5
;
X
1
+
6
;
X
A
@
3
x
= 2
dx
= 0.00002
d/dx
= ?
2
e
e
x
= 3
dx
= 0.001
d/dx
= ?
e
3
e
0.001
e
≈^4-0.5≈„+6≈Œ
≈=z 0.
dx: 0.00001
≈^4-0.5≈„+6≈Œ
d/dx=
50.
≈^4-0.5≈„+6≈Œ
d/dx=
130.5000029
Summary of Contents for EL-5230
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