Casio fx-115ES User Manual

E-35
Tips on Improving Integration Value Accuracy
•When a periodic function or integration interval results in positive
and negative f(x) function values
Perform separate integrations for each cycle, or for the positive
part and the negative part, and then combine the results.
Positive Part Negative Part
(
S Positive) (S Negative)
•When integration values fluctuate widely due to minute shifts in
the integration interval
Divide the integration interval into multiple parts (in a way that
breaks areas of wide fluctuation into small parts), perform
integration on each part, and then combine the results.
Appendix
<#031> ∫(ln(x), 1, e) = 1 (tol specification omitted.)
<#032>
∫
(
, 1, 5, 1×10
–7
)
= 0.8
a
b
f(x)dx =
a
x
1
f(x)dx +
x 1
x
2
f(x)dx +
.....+
x 4
b
f(x)dx
∫∫∫
∫
∫∫ ∫
a
b
f(x)dx =
a
c
f(x)dx + (–
c
b
f(x)dx)
1
x
2
S Negative
S Positive

Casio fx-115ES Specifications

General

Type	Scientific
Cover	Yes
Form factor	Pocket
Control type	Buttons
Product color	Silver
Housing material	Plastic
Digits	12 digits
Display tilting	-
Backlight display	No
Display number of lines	2 lines
Power source	Battery/Solar
Memory registers	7