2.2
鏁村紡鐨勫姞鍑忓悓
姝?/p>
缁?/p>
涔?/p>
涓�銆佸～绌洪
1.3
xy
涓庯紞
3
xy
鐨勫樊鏄?/p>
_____.
2.
涓�涓椤瑰紡鍑忓幓
5
ab
锛?/p>
3
b
2
绛変簬
2
a
2
锛?/p>
2
ab
+
b
2
,
杩欎釜澶氶」寮忔槸
_____.
3.
锛?/p>
( )+2
a
锛?/p>
3
锛?/p>
+
锛伙紞
3
a
2
锛?/p>
2
a
+( )
锛?/p>
=
a
2
锛?/p>
1.
4.
琚噺寮忎负
3
2
x
2
锛?/p>
4
3
+
2
1
x
,
宸紡涓猴紞
10
锛?/p>
x
2
+3
x
锛屽垯鍑忓紡涓?/p>
_____.
5.2
x
2
y
m
涓庯紞
3
x
n
y
鏄悓绫婚」锛屽垯
m
=_____,
n
=_____.
6.
涓変釜杩炵画鑷劧鏁帮紝璁句腑闂翠竴涓负
x
锛屽垯杩欎笁涓繛缁嚜鐒舵暟鐨勫拰涓?/p>
_____.
7.
鏌愬悓瀛﹁绠椻�?/p>
15+2
ab
鈥濈殑鍊兼椂锛屾妸涓棿鐨勮繍绠楃鍙封�?/p>
+
鈥濈湅鎴愨�滐紞鈥?/p>
锛屼粠鑰屽緱鍑哄叾鍊间负
7
锛岄偅涔堬紝瀹?/p>
鐨勬纭�煎簲涓?/p>
_____.
8.
瀹炴暟
a
銆?/p>
b
銆?/p>
c
鍦ㄦ暟杞翠笂鐨勫搴旂偣濡傚浘
1
锛屽寲绠�
a
+|
a
+
b
|
锛?/p>
|
b
锛?/p>
c
|
锛?/p>
|
b
+
c
锛?/p>
a
|=_____.
鍥?/p>
1
9.
濡傚浘
2
锛?/p>
涓�鍧楅暱
a
绫筹紝
瀹?/p>
b
绫崇殑鐭╁舰鍦熷湴寮�鍑轰袱鏉″閮芥槸
2
绫?/p>
鐨勫皬璺紝
鍒?/p>
S
1
_____
S
2
(
濉紴銆?/p>
锛滄垨
=)
锛?/p>
涓ゆ潯灏忚矾娴垂鐨勫湡鍦伴潰绉槸
_____.
鍥?/p>
2
浜屻�侀�夋嫨棰?/p>
10.
璁＄畻
(3
a
2
锛?/p>
2
a
+1)
锛?/p>
(2
a
2
+3
a
锛?/p>
5)
鐨勭粨鏋滄槸
( )
A.
a
2
锛?/p>
5
a
+6
B.
a
2
锛?/p>
5
a
锛?/p>
4
C.
a
2
+
a
锛?/p>
4
D.
a
2
+
a
+6
11.
闀挎柟褰㈢殑涓�杈归暱涓?/p>
2
a
+
b
,
鍙︿竴杈规瘮瀹冨ぇ
a
锛?/p>
2
1
b
锛屽垯鍛ㄩ暱涓?/p>
( )
A.10
a
+3
b
B.5
a
+
b
C.7
a
+
b
D.10
a
锛?/p>
b
12.
鑻?/p>
a
锛?/p>
0,
b
锛?/p>
0
锛屼笖
|
a
|
锛?/p>
|
b
|,
鍒欎笅鍒楁暣寮?/p>
鐨勫�间腑涓鸿礋鏁扮殑鏄?/p>
( )
A.
a
+
b
B.
a
锛?/p>
b
C.
b
锛?/p>
a
D.|
a
锛?/p>
b
|
13.
涓�涓椤瑰紡鍔犱笂
ab
锛?/p>
3
b
2
绛変簬
b
2
锛?/p>
2
ab
+
a
2
锛屽垯杩欎釜澶氶」寮忎负
( )