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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