Casio FX-9860G bE-f), <Math, (CALC), Example, +evx+v-ged, A4(MATH)4(d/dx)vMde, Input the function f(x), Input the tolerance value, AK4(CALC)2(d/dx)vMd+evx+v-g

2-5-3

Numerical Calculations

Example	To determine the derivative at point x = 3 for the function
	y = x3 + 4x2 + x – 6, with a tolerance of “tol” = 1E – 5

Input the function f(x).AK4(CALC)2(d/dx)vMd+evx+v-g,Input point x = a for which you want to determine the derivative.

d,

Input the tolerance value.bE-f)

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<Math>

A4(MATH)4(d/dx)vMde+evx+v-ged

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#In the function f(x), only X can be used as a variable in expressions. Other variables (A through Z excluding X, r, Ƨ) are treated as constants, and the value currently assigned to that variable is applied during the calculation.

#Input of the tolerance (tol) value and the closing parenthesis can be omitted. If you omit tolerance (tol) value, the calculator automatically uses a value for tol as 1E-10.

#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.

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

#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

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