Casio fx-570ES PLUS, Руководство пользователя, Страница: 34 / 84

Differential Calculation Precautions
• Differential calculation can be performed in the COMP Mode only.
• The following cannot be used in
f ( x ), a , b , or tol : Pol, Rec, ∫ , d/dx , Σ .
• When using a trigonometric function in f ( x ), specify Rad as the angle
unit.
• A smaller tol value increases precision, but it also increases calculation
time. When specifying tol , use value that is 1 × 10
-14
or greater.
• If convergence to a solution cannot be found when tol input is omitted,
the
tol
value will be adjusted automatically to determine the solution.
• Non-consecutive points, abrupt fluctuation, extremely large or small
points, inflection points, and the inclusion of points that cannot be
differentiated, or a differential point or differential calculation result that
approaches zero can cause poor precision or error.
Σ Calculations
Function that, for a specified range of
f
(
x
), determines sum
(
f
(
x
)) =
f
(
a
) +
f
(
a
+ 1) +
f
(
a
+ 2) + ⋯ +
f
(
b
).
Natural Display input syntax is ( f ( x )), while Linear Display input syntax
is ∑ ( f ( x ), a , b ).
a and b are integers that can be specified within the range of -1 × 10
10
< a
≦
b < 1 × 10
10
.
Example: ( x + 1) = 20
(MthIO-MathO)
( ) (X) 1 1 5 20
(LineIO)
( ) (X) 1 (,) 1
(,) 5
20
Note
• The following cannot be used in f ( x ), a , or b : Pol, Rec, ∫ , d/dx , Σ .
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