Casio SERIES FX-9860G User Manual
Page 104
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.
K4(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
).
AK4(CALC)4( ∫
dx
)c
vx+dv+e,
Input the start point and end point.
b,f,
Input the tolerance value.
bE-e)
w
∫
( f(x), a,
b
,
tol)
⇒
∫
a
b
f(x)dx
∫
( f(x), a,
b
,
tol)
⇒
∫
a
b
f(x)dx
∫
1
5
(2x
2
+ 3x + 4) dx
∫
1
5
(2x
2
+ 3x + 4) dx
2-5-7
Numerical Calculations
# If
f
(
x
) < 0 where
a
<
x
<
b
, the surface area
calculation produces negative values (surface
area
Ч – 1).