1
涓撻鑳藉姏璁粌
21
涓嶇瓑寮忛�夎
涓�銆佽兘鍔涚獊鐮磋缁?/p>
1
.
鑻?/p>
a>
0,
b>
0,
涓?/p>
.
(1)
姹?/p>
a
3
+b
3
鐨勬渶灏忓�?/p>
;
(2)
鏄惁瀛樺湪
a
,
b
,
浣垮緱
2
a+
3
b=
6?
骞惰鏄庣悊鐢?/p>
.
2
.
璁惧嚱鏁?/p>
f
(
x
)
=
+|x-a|
(
a>
0)
.
(1)
璇佹槑
:
f
(
x
)鈮?;
(2)
鑻?/p>
f
(3)
<
5,
姹?/p>
a
鐨勫彇鍊艰寖鍥?/p>
.
3
.
宸茬煡鍏充簬
x
鐨勪笉绛夊紡
m-|x-
2
|
鈮?,鍏惰В闆嗕负
[0,4]
.
(1)
姹?/p>
m
鐨勫�?/p>
;
(2)
鑻?/p>
a
,
b
鍧囦负姝ｅ疄鏁?/p>
,
涓旀弧瓒?/p>
a+b=m
,
姹?/p>
a
2
+b
2
鐨勬渶灏忓�?/p>
.
4
.
宸茬煡鍑芥暟
f
(
x
)
=
,
M
涓轰笉绛夊紡
f
(
x
)
<
2
鐨勮В闆?/p>
.
(1)
姹?/p>
M
;
(2)
璇佹槑
:
褰?/p>
a
,
b
鈭?/p>
M
鏃?/p>
,
|a+b|<|
1
+ab|.