•Input of the tolerance (tol) value and the closing parenthesis can be omitted.

•Specify a tolerance (tol) value of 1E–14 or greater. An error (Time Out) occurs whenever no solution that satisfies the tolerance value can be obtained.

•The rules that apply for linear differential also apply when using a quadratic differential calculation for the graph formula (see page 2-24).

•Inaccurate results and errors can be caused by the following:

-discontinuous points in x values

-extreme changes in x values

-inclusion of the local maximum point and local minimum point in x values

-inclusion of the inflection point in x values

-inclusion of undifferentiable points in x values

-differential calculation results approaching zero

• You can interrupt an ongoing quadratic differential calculation by pressing the

key.

•Always use radians (Rad mode) as the angle unit when performing trigonometric quadratic differentials.

•You cannot use a differential, quadratic differential, integration, 3, maximum/minimum value,

Solve, RndFix or logab calculation expression inside of a quadratic differential calculation term.

•With quadratic differential calculation, calculation precision is up to five digits for the mantissa.

•In the Math input/output mode, the tolerance value is fixed at 1E–10 and cannot be changed.

IIntegration Calculations

[OPTN]-[CALC]-[°dx]

To perform integration calculations, first display the function analysis menu and then input the values using the syntax below.

*(CALC)* (°dx) f(x) a b tol 

* fx-7400GII: (CALC)

(a: start point, b: end point, tol: tolerance)

 f(x), a, b, tol)  abf(x)dx

Area of abf (x)dx is calculated

As shown in the illustration above, integration calculations are performed by calculating integral values from a through b for the function y = f (x) where a x b, and f (x) 0. This in effect calculates the surface area of the shaded area in the illustration.

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