Casio CFX-9850GB PLUS, Руководство пользователя

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20070201
k
Integration Calculations
[OPTN] - [CALC] - [
∫
dx
]
To perform integration calculations, fi rst display the function analysis menu and then input the
values using the syntax below.
K
4
(CALC)
4
(
∫
dx
)
f
(
x
) ,
a
,
b
,
tol
)
(
a
: start point,
b
: end point,
tol
: tolerance)
Area of
∫
a
b
f ( x ) dx
is calculated
As shown in the illustration above, integration calculations are performed by calculating
integral values from
a
through
b
for the function
y
=
f
(
x
) where
a
<
x
<
b
, and
f
(
x
)
>
0. This in
effect calculates the surface area of the shaded area in the illustration.
Example To perform the integration calculation for the function shown
below, with a tolerance of “
tol ” = 1
E
- 4
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
∫
(
f ( x ), a ,
b
,
tol )
⇒
∫
a
b
f ( x ) dx
∫
(
f ( x ), a ,
b
,
tol )
⇒
∫
a
b
f ( x ) dx
∫
1
5
(2 x
2
+ 3 x + 4) dx
∫
1
5
(2 x
2
+ 3 x + 4) dx
2-5-7
Numerical Calculations
# If
f
(
x
) < 0 where
a < x < b
, the surface area
calculation produces negative values (surface
area
×
– 1).