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8–6 Integrating Equations
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
0
2
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Enters limits of integration (lower
first).
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Displays the current equation.
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Calculates the result for Si(2).
Accuracy of Integration
Since the calculator cannot compute the value of an integral exactly, it
approximates it. The accuracy of this approximation depends on the
accuracy of the integrand's function itself, as calculated by your equation.
This is affected by round–off error in the calculator and the accuracy of the
empirical constants.
Integrals of functions with certain characteristics such as spikes or very rapid
oscillations might be calculated inaccurately, but the likelihood is very small.
The general characteristics of functions that can cause problems, as well as
techniques for dealing with them, are discussed in appendix D.
Specifying Accuracy
The display format's setting (FIX, SCI, ENG, or ALL) determines the precision
of the integration calculation, the greater the number of digits displayed, the
greater the precision of the calculated integral (and the greater the time
required to calculate it.). The fewer the number of digits displayed, the faster
the calculation, but the calculator will presume that the function is accurate to
only the number of digits specified in the display format.
To specify the accuracy of the integration, set the display format so that the
display shows no more than the number of digits that you consider accurate in
the integrand's values. This same level of accuracy and precision will be
reflected in the result of integration.
If Fraction–display mode is on (flag 7 set), the accuracy is specified by the
previous display format.