2-5-6

Numerical Calculations

<Math>

A4(MATH)5(d2/dx2)vMde+evx+v-gedwuQuadratic Differential Applications• Arithmetic operations can be performed using two quadratic differentials.

d2

d 2

–––f (a) = f ''(a),–––g (a) = g''(a)

dx2

dx2

Therefore:

f ''(a) + g''(a), f ''(a) g''(a), etc.

The result of a quadratic differential calculation can be used in a subsequent arithmetic or function calculation.

2 f ''(a), log ( f ''(a) ), etc.

Functions can be used within the terms ( f(x), a, tol ) of a quadratic differential expression.

d2

–––(sin x + cos x, sin 0.5, 1E - 8), etc. dx2

#In the Math input mode, the tolerance value is fixed at 1E-10 and cannot be changed.

#The rules that apply for linear differential also apply when using a quadratic differential calculation for the graph formula (see page 2-5-2).

#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 A key.

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

#You cannot use a differential, quadratic differential, integration, Σ, maximum/minimum

value, Solve, RndFix or log ab calculation expression inside of a quadratic differential calculation term.

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

20070201