Casio FX-9860GII-L-IH User Guide - Page 99
Quadratic Differential Calculations, OPTN], CALC], Example
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2-5-5 Numerical Calculations k Quadratic Differential Calculations [OPTN]-[CALC]-[d2/dx2] After displaying the function analysis menu, you can input quadratic differentials using the following syntax. K4(CALC)3(d 2/dx2) f(x),a,tol) (a: differential coefficient point , tol: tolerance) -dd-x2-2 (f (x), a) ⇒ -dd-x2-2 f (a) Quadratic differential calculations produce an approximate differential value using the following second order differential formula, which is based on Newton's polynomial interpretation. f''(a) = -2-f-(-a-+--3-h-)---2-7--f(-a-+--2-h-)-+--2-7-0-f-(a--+-h-)----4-9-0-f-(-a-)+-2-7-0--f(-a----h-)---2-7--f-(a----2-h-)-+-2--f(-a----3-h-) 180h2 In this expression, values for "sufficiently small increments of h" are used to obtain a value that approximates f "(a). Example To determine the quadratic differential coefficient at the point where x = 3 for the function y = x3 + 4x2 + x - 6 Here we will use a tolerance tol = 1E - 5 Input the function f(x). AK4(CALC)3(d 2/dx2) vMd+ evx+v-g, Input 3 as point a, which is the differential coefficient point. d, Input the tolerance value. bE-f) w # In the function f(x), only X can be used as a variable in expressions. Other variables (A through Z excluding X, r, θ) 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. # 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. 2007501401