F 1 2, P 1 p 2 t = 3, Example 1 – Casio fx-570MS User Manual
Page 35
– 32 –
Solving Integrations, with an
Emphasis on Definite Integrals
(fx-100MS/fx-115MS/fx-570MS/fx-991MS only)
Example 1
Example 1
Explanation
Explanation
Operation
Determine the area enclosed by
y
=
x
2
+ 2, the
x
-axis, and
x
= 1,
x
= 2.
The area enclosed by
y
=
f
(
x
), the
x
-axis, and
x
=
a
,
x
=
b
is generally
determined using the definite integral
∫
b
a
f
(
x
)
dx
.
1
.
Select the COMP Mode.
F 1
2
.
Calculate the value of the definite integral values for
y
=
x
2
+ 2 from
x
= 1 to
x
= 2.
d p
x K +
2
P 1 P 2 T =
3
.
This produces a definite integral value of 4.333333333.
The above indicates that the area being calculated is 4.333333333 (= 13/3).
a
f (x)
a
x
b