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绐佺牬
1
鍒╃敤瀵兼暟姹傛瀬鍊笺�佹渶鍊笺�佸弬鏁拌寖鍥?/p>
1
.
宸茬煡鍑芥暟
f
(
x
)
=
(
x-k
)e
x
.
(1)
姹?/p>
f
(
x
)
鐨勫崟璋冨尯闂?/p>
;
(2)
姹?/p>
f
(
x
)
鍦ㄥ尯闂?/p>
[0,1]
涓婄殑鏈�灏忓�?/p>
.
2
.
(2018
灞变笢娼嶅潑涓�妯?/p>
,21)
宸茬煡鍑芥暟
f
(
x
)
=a
ln
x+x
2
.
(1)
鑻?/p>
a=-
2,
鍒ゆ柇
f
(
x
)
鍦?/p>
(1,
+鈭?/p>
)
涓婄殑鍗曡皟鎬?/p>
;
(2)
姹傚嚱鏁?/p>
f
(
x
)
鍦?/p>
[1,e]
涓婄殑鏈�灏忓�?/p>
.
3
.
(2018
灞变笢甯堝ぇ闄勪腑涓�妯?/p>
,21)
宸茬煡鍑芥暟
f
(
x
)
=
(
x-a
)e
x
(
a
鈭?/p>
R
)
.
(1)
褰?/p>
a=
2
鏃?/p>
,
姹傚嚱鏁?/p>
f
(
x
)
鍦?/p>
x=
0
澶勭殑鍒囩嚎鏂圭▼
;
(2)
姹?/p>
f
(
x
)
鍦ㄥ尯闂?/p>
[1,2]
涓婄殑鏈�灏忓�?/p>
.
4
.
(2018
杈藉畞鎶氶『
3
鏈堟ā鎷?/p>
,21
鏀圭紪
)
宸茬煡鍑芥暟
f
(
x
)
=ax-
2ln
x
(
a
鈭?/p>
R
)
.
鑻?/p>
f
(
x
)
+x
3
>
0
瀵逛换鎰?/p>
x
鈭?/p>
(1,
+鈭?/p>
)
鎭掓垚
绔?/p>
,
姹?/p>
a
鐨勫彇鍊艰寖鍥?/p>
.
5
.
璁惧嚱鏁?/p>
f
(
x
)
=x
2
+ax+b
,
g
(
x
)
=
e
x
(
cx+d
)
.
鑻ユ洸绾?/p>
y=f
(
x
)
鍜屾洸绾?/p>
y=g
(
x
)
閮借繃鐐?/p>
P
(0,2),
涓斿湪鐐?/p>
P
澶勬湁鐩稿悓鐨?/p>
鍒囩嚎
y=
4
x+
2
.
(1)
姹?/p>
a
,
b
,
c
,
d
鐨勫�?/p>
;
(2)
鑻?/p>
x
鈮?/p>
-
2
鏃?/p>
,
f
(
x
)
鈮?/p>
kg
(
x
),
姹?/p>
k
鐨勫彇鍊艰寖鍥?/p>
.
6
.
(2018
姹熻タ鍗楁槍涓�妯?/p>
,21
鏀圭紪
)
宸茬煡鍑芥暟
f
(
x
)
=
e
x
-a
ln
x-
e(
a
鈭?/p>
R
),
鍏朵腑
e
涓鸿嚜鐒跺鏁扮殑搴曟暟
.
鑻ュ綋
x
鈭?/p>
[1,
+鈭?/p>
)
鏃?/p>
,
f
(
x
)
鈮?/p>
0
鎭掓垚绔?/p>
,
姹?/p>
a
鐨勫彇鍊艰寖鍥?/p>
.
绐佺牬
2
鍒╃敤瀵兼暟璇佹槑闂鍙婅璁洪浂鐐逛釜鏁?/p>