Casio fx-9860G SD User Manual
Page 101
20050401
k
k
k
k
k Integration Calculations
[OPTN]-[CALC]-[
∫dx]
To perform integration calculations, first display the function analysis menu and then input
the values using the syntax below.
K
4(CALC)4 (
∫dx) f(x) ,
a
,
b
,
tol
)
∫
( f(x), a,
b
,
tol)
⇒
∫
a
b f(x)dx
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
∫
1
5
(2x
2
+ 3x + 4) dx
Input the function
f (x)
.
AK4(CALC)4(
∫dx
)cvx+dv+e,
Input the start point and end point.
b,f,
Input the tolerance value.
b
E-e)
w
2-5-7
Numerical Calculations
Area of
∫
a
b
f(x)dx
is calculated
(
a
: s
tart point,
b
:
end point,
tol
:
tolerance)
# If f (x) < 0 where a < x < b, the surface area
calculation produces negative values (surface
area
Ч – 1).