1
骞抽潰鍚戦噺鐨勬暟閲忕Н鍙婂钩闈㈠悜閲忕殑搴旂敤
銆愰�夐鏄庣粏琛ㄣ�?/p>
鐭ヨ瘑鐐广�佹柟娉?/p>
棰樺彿
鏁伴噺绉殑杩愮畻
1
銆?/p>
4
銆?/p>
9
闀垮害鍙婂瀭鐩撮棶棰?/p>
1
銆?/p>
2
銆?/p>
3
銆?/p>
5
澶硅闂
7
銆?/p>
10
骞抽潰鍚戦噺鐨勫簲鐢?/p>
6
銆?/p>
8
銆?/p>
11
銆?/p>
12
涓�銆侀�夋嫨棰?/p>
1.(2012
骞撮珮鑰冮噸搴嗗嵎
)
璁?/p>
x
鈭?/p>
R
锛?/p>
鍚戦噺
a
=(x
锛?/p>
1)
锛?/p>
b
=(1
锛?/p>
-2)
锛?/p>
涓?/p>
a
鈯?/p>
b
锛?/p>
鍒?/p>
|
a
+
b
|
绛変簬
(
B
)
(A)
(B)
(C)2
(D)10
瑙ｆ瀽
:
鈭?/p>
a
鈯?/p>
b
锛屸埓
x-2=0
锛?/p>
鈭?/p>
x=2.
鈭?/p>
|
a
+
b
|=
=
=
=
.
鏁呴�?/p>
B.
2.(2013
涔愬北甯傜涓�娆¤皟鐮?/p>
)
宸茬煡涓ょ偣
A(-1
锛?/p>
0)
锛?/p>
B(1
锛?/p>
3)
锛屽悜閲?/p>
a=(2k-1
锛?/p>
2)
锛岃嫢
鈯?/p>
a
锛?
鍒欏疄鏁?/p>
k
鐨勫�间负
(
C
)
(A)2
(B)1
(C)-1
(D)-2
瑙ｆ瀽
:
鐢?
=(2
锛?/p>
3)
锛屽洜涓?
鈯?/p>
a
锛?/p>
鎵�浠?/p>
2(2k-1)+2
脳
3=0
锛?/p>
寰?/p>
k=-1
锛屾晠閫?/p>
C.
3.(2012
骞撮珮鑰冭窘瀹佸嵎
)
宸茬煡涓や釜闈為浂鍚戦噺
a
銆?/p>
b
婊¤冻
|
a
+
b
|=|
a
-
b
|
锛屽垯涓嬮潰缁撹姝ｇ‘鐨勬槸
(
B
)
(A)
a
鈭?/p>
b
(
B)
a
鈯?/p>
b
(C)|
a
|=|
b
|
(D)
a
+
b
=
a
-
b
瑙ｆ瀽
:
娉曚竴
浠ｆ暟娉?/p>
:
灏嗗師寮忓钩鏂瑰緱
|
a
+
b
|
2
=|
a
-
b
|
2
锛?/p>
鈭?/p>
a
2
+2
a
路
b
+
b
2
=
a
2
-2
a
路
b
+
b
2
锛屸埓
a
路
b
=0
锛屸埓
a
鈯?/p>
b
锛?/p>
鏁呴�?/p>
B.
娉曚簩
鍑犱綍娉?/p>
:
濡傚浘鎵�绀猴紝
鍦?/p>
鈻?/p>
ABCD
涓紝璁?
=
a
锛?
=
b
锛?/p>
鈭?
=
a
+
b
锛?/p>
=
a
-
b
锛?/p>