Casio CFX-9950GB PLUS Manual de cálculos - Página 4

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3 - 2

Differential Calculations

This average, which is called the central difference , is expressed as:

u u u u u To perform a differential calculation

Input the function

Input point

Input A

f (a + Ax) – f (a)

f '(a) = –– –––––––––– ––– + –––––––––– –––

f (a + Ax) – f (a – Ax)

= –––––––––– –––––––

Example

To determine the derivative at point

+ 4

as A A A A A

= 1

f(x)

AK4(CALC)2(

for which you want to determine the derivative.

, which is the increase/decrease of

bE-f)

f(x)

• In the function

, only X can be used as a variable in expressions. Other

variables (A through Z,

assigned to that variable is applied during the calculation.

• Input of A

and the closing parenthesis can be omitted. If you omit A

calculator automatically uses a value for A

tive value you are trying to determine.

• Discontinuous points or sections with drastic fluctuation can adversely affect

precision or even cause an error.

f (a) – f (a – Ax)

– 6, when the increase/decrease of

– 5

d/dx

)vMd+evx+v-g,

, ) are treated as constants, and the value currently

= 3 for the function

that is appropriate for the deriva-

is defined

, the