differential calculation result that approaches zero can cause poor precision or error.

• You can interrupt an ongoing differential calculation operation by pressing o.

k Second Derivative

Your calculator lets you calculate the second derivative coefficient (d2/dx2( f (x))x=a) for f (x) where x = a. Your calculator uses approximation based on the second order value differential equation of the Newton interpolation polynomial. Calculation is performed using the function shown below.

d2/dx2(

A Syntax and Input

d 2/dx2( f (x), a, tol)f (x): Function of x (Input the function used by variable X.)

• All variables other than X are viewed as constants.

a: Value of point (second derivative point) of desired second derivative coefficient

tol: Error tolerance range (Can be input only when linear display is being used.)

• This parameter can be omitted. In that case, a tolerance of 1 × 10–10is used.

Example 1: To obtain the second derivative coefficient for the function y = x3 + 4x2 + x – 6 when x = 3

B

z – {MATH}3(d2/dX2)S0(X)63e +4S0(X)x+S0(X)-6e3E

Example 2: To perform the same procedure as Example 1, specifying tol = 1 × 10–12

Since you want to specify a value for tol, you will need to perform this calculation using linear display.

b

z – {MATH}3(d2/dX2)S0(X)63)+4 S0(X)x+S0(X)-6,3,1Z- 12)E

ARemarks

See the remarks for derivative on page 45.

k Σ Calculation

This function determines the sum of an input f (x) for a specified range. Calculation is performed using the function shown below.

Σ(

E-46