,
a
=-
1
f
′
(
1
)
=
0
,
a
=
1
f
′
(
-
1
)
=
0
,
A
=
{
a
|-
1
≤
a
≤
1
}
.
2.4
[
a
,
b
]
[
a
,
b
]
6
,
y
=
f
(
x
) [
a
,
b
]
( ), [
a
,
b
] ( )
,
( )
.
y
=
f
(
x
)
( ) [
a
,
b
], [
a
,
b
]
( ) , , ,
x
=
a
,
x
=
b
f
′
(
x
)
=
0
.
8
f
(
x
)
=
x
3
+
bx
2
+
cx
+
d
[
-
1
,
2
],
y
=-
27
4
x
+
1
8
,
b
,
c
,
d
.
f
′
(
x
)
=
3
x
2
+
2
bx
+
c
,
f
(
x
)
[
-
1
,
2
],
-
1
,
2
3
x
2
+
2
bx
+
c
=
0 .
-
1
+
2
= -
2
b
3
,
-
1
×
2
=
c
3
,
b
=-
3
2
,
c
=-
6.
y
= -
27
4
x
+
1
8
,
1
2
,
-
13
4
( )
,
f
(
x
)
=
x
3
-
3
2
x
2
-
6
x
+
d
,
d
=
0.
, 、
.
3
3.1
“ ”,
,
、 、
.
“ ,
”, “ ” “
” , ,
、 ,
.
3.2
、
、 ,
、 、
.
,
“ ”
.
,
.
,
,
、 ,
.
,
,
.
3.3
“ ” “ ”
: ,
.
( ),
, “
”, 、
.
、 ,
,
.
,
, 、 “ ” “ ”
.
檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪檪
(
30
)
, 、 ,
,
.
[
1
]
,
.
[
J
]
.
,
2019
(
12
):
27
-
32.
[
2
]
,
.
[
J
]
.
,
2004
(
1
):
44
-
49.
[
3
]
,
.
[
J
]
.
,
2020
(
2
):
1
-
3.
·
73
·
2021 6