3.3
杞村绉颁笌鍧愭爣鍙樺寲
1.
鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴涓紝鐐?/p>
P(2m+3
锛?/p>
3m-1)
鍦ㄧ涓�鎴栫涓夎薄闄愶紝涓斿埌
x
杞淬�?/p>
y
杞寸殑璺濈鐩哥瓑锛屽垯
鐐?/p>
P
鐨勫潗鏍囦负
( )
A
锛?/p>
(4
锛?/p>
4) B
锛?/p>
(3
锛?/p>
3)
C
锛?/p>
(11
锛?/p>
11) D
锛?/p>
(-11
锛?/p>
-11)
2.
鑻ョ偣
P(2m+4
锛?/p>
3m+3)
鍦?/p>
x
杞翠笂锛屽垯鐐?/p>
P
鐨勫潗鏍囦负
____
锛?/p>
3.
宸茬煡鐐?/p>
P
鐨勫潗鏍囦负锛?/p>
a+2
锛?/p>
b-3
锛?/p>
锛?/p>
(1)
鑻ョ偣
P
鍦?/p>
x
杞翠笂锛屽垯
b=____
锛?/p>
(2)
鑻ョ偣
P
鍦?/p>
y
杞翠笂锛屽垯
a____
锛?/p>
(3)
鑻ョ偣
P
鍦ㄧ浜岃薄闄愶紝鍒?/p>
a____
锛?/p>
b____.
4
锛庣偣
P(
锛?/p>
m
锛?/p>
m
锛?/p>
1)
鍦ㄧ涓夎薄闄愶紝鍒?/p>
m
鐨勫彇鍊艰寖鍥存槸
______
锛?/p>
5
锛庤嫢鐐?/p>
P(m
锛?/p>
n)
鍦ㄧ浜岃薄闄愶紝鍒欑偣
Q(|m|
锛岋紞
n)
鍦ㄧ
______
璞￠檺锛?/p>
6
锛庡凡鐭ョ偣
A
鍒?/p>
x
杞淬�?/p>
y
杞寸殑璺濈鍒嗗埆涓?/p>
2
鍜?/p>
6
锛岃嫢
A
鐐瑰湪
y
杞村乏渚э紝鍒?/p>
A
鐐瑰潗鏍囨槸
______
锛?/p>
7
锛?/p>
A(
锛?/p>
3
锛?/p>
4)
鍜岀偣
B(3
锛岋紞
4)
鍏充簬
______
瀵圭О
锛?/p>
8
锛庤嫢
A(m
锛?/p>
4
锛?/p>
n)
鍜岀偣
B(n
锛?/p>
1
锛?/p>
2m
锛?/p>
1)
鍏充簬
x
杞村绉帮紝鍒?/p>
m
锛?/p>
______
锛?/p>
n
锛?/p>
______
锛?/p>
9.
宸茬煡鐐?/p>
M(2a-1
锛?/p>
3a)
锛屽綋
-1<a<0
鏃讹紝闂細鐐?/p>
M
鍦ㄧ鍑犺薄闄愶紵
10.
璁剧偣
A
鐨勫潗鏍囦负锛?/p>
a
锛?/p>
b
锛?/p>
锛屾牴鎹笅鍒楁潯浠跺垽瀹氱偣
A
鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴涓殑浣嶇疆锛?/p>
(1)a+b=0;
(2)ab=0;
(3)ab>0.
11.
濡傚浘锛岃瀵熷潗鏍囩郴涓笅鍒楀悇鐐癸細
A(-4,-4),B(-2,-2),C(3,3),D(5,5),E(-3
锛?/p>
-3)
锛?/p>
F(0
锛?/p>
0)
锛庝綘鍙戠幇杩欎簺鐐规湁
浠�涔堝叧绯讳簡鍚楋紵浣?/p>
鑳藉啀鎵惧嚭涓�浜涚被浼肩殑鐐瑰悧锛?/p>