Casio CFX-9850G PLUS, User'S Manual & Technical Reference

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61
u u
u u
u
To perform an integration calculation
Example To perform the integration calculation for the function shown
below, with a tolerance of “tol” = 1
E
- 4
∫
1
5
(2 x 2 + 3 x + 4) dx
Input the function
f ( x )
.
A K 4
(CALC)
4
(
∫
dx
)
c vx +d v +e,
Input the start point and end point.
b,f,
Input the tolerance value.
b E- e) w
• In the function
f
(
x
)
, only X can be used as a variable in expressions. Other
variables (A through Z,
r
,
θ
) are treated as constants, and the value currently
assigned to that variable is applied during the calculation.
• Input of “tol” in Gauss-Kronrod Rule, “
n
” in Simpson’s Rule, and closing
parenthesis with both rules can be omitted. If you omit “tol”, the calculator
automatically uses a value of 1
E
- 5. In the case of “
n
”, the calculator automati-
cally selects the most appropriate value.
• Integration calculations can take a long time to complete.
k k
k k k
Application of Integration Calculation
• Integrals can be used in addition, subtraction, multiplication or division.
∫
a
b
f ( x ) dx +
∫
c
d
g ( x ) dx , etc.
• Integration results can be used in addition, subtraction, multiplication or
division, in functions.
2
×
∫
a
b
f
(
x
)
dx
, etc. log (
∫
a
b
f
(
x
)
dx
), etc.
• Functions can be used in any of the terms
( f ( x ) , a, b, n )
of an integral.
∫
cos 0.5
(sin x + cos x ) dx =
∫
(sin x + cos x , sin 0.5, cos 0.5, 5)
sin 0.5
• Note that you cannot use a Solve, differential, quadratic differential, integration,
maximum/minimum value or
Σ
calculation expression inside of an integration
calculation term.
Integration Calculations
3 - 4