Casio fx-115ES Manual do Utilizador descarregar pdf (Página 37)

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

f(x)dx =

f(x)dx +

.....+

f(x)dx

∫∫∫

∫

∫∫ ∫

f(x)dx =

f(x)dx + (–

f(x)dx)

S Negative

S Positive

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