Improving Integration Value Accuracy - Casio fx-570ES User Manual

Tips on Improving Integration Value Accuracy
• When a periodic function or integration interval results in positive
and negative
Perform separate integrations for each cycle, or for the positive
part and the negative part, and then combine the results.
S
b
∫
f(x)dx =
a
• 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.
b
∫
f(x)dx =
a
Appendix
∫
x
<#031> (ln(
1
(
∫
<#032>
2
x
f x
( ) function values
Positive
c
∫
f(x)dx + (–
a
Positive Part
S
( Positive)
x
∫
1
f(x)dx +
a
e
), 1, ) = 1
, 1, 5, 1×10
S
Negative
b
∫
f(x)dx)
c
Negative Part
S
( Negative)
x
∫
2
f(x)dx + .....+
x
1
tol
(
)
–7
= 0.8
E-35
b
∫
f(x)dx
x
4
specification omitted.)