2019
骞?/p>
1
鏈堝箍涓滅渷楂樹腑瀛︿笟姘村钩鑰冭瘯鏁板
涓�銆侀�夋嫨棰橈細鏈ぇ棰樺叡
15
灏忛锛屾瘡灏忛
4
鍒嗭紝婊″垎
60
鍒?/p>
.
鍦ㄦ瘡灏忛缁欏嚭鐨勫洓涓�夐」涓紝鍙?/p>
鏈変竴椤规槸绗﹀悎棰樼洰瑕佹眰鐨?/p>
.
1.
宸茬煡闆嗗悎
A
={0,2,4},
B
={-2,0,2},
鍒?/p>
A
鈭?/p>
B
=(
)
A.{0,2}
B.{-2,4}
C.[0,2]
D.{-2,0,2,4}
1.D
銆愯В鏋愩�戠敱骞堕泦鐨勫畾涔夛紝鍙緱
A
鈭?/p>
B
={-2,0,2,4}.
鏁呴�?/p>
D.
2.
璁?/p>
i
涓鸿櫄鏁板崟浣?/p>
,
鍒欏鏁?/p>
i(3+i)=(
)
A.1+3i
B.-1+3i
C.1-3i
D.-1-3i
2.B
銆愯В鏋愩�?/p>
i(3+i)=3i+i
2
=3i-1.
鏁呴�?/p>
B.
3.
鍑芥暟
y
=log
3
(
x
+2)
鐨勫畾涔夊煙涓?/p>
(
)
A.(-
2,+鈭?
B.(2,+鈭?
C.[-
2,+鈭?
D.[2,+鈭?
3.A
銆愯В鏋愩�戣浣?/p>
y
=log
3
(
x
+2)
鏈夋剰涔夛紝鍒?/p>
x
+2>0
锛岃В寰?/p>
x
>-2
锛屽嵆瀹氫箟鍩熶负
(-
2,+鈭?.
鏁呴�?/p>
A.
4.
宸茬煡鍚戦噺
a
=(2,-2),
b
=(2,-1),
鍒?/p>
|
a
+
b
|=(
)
A.1
B.
5
C.5
D.25
4.C
銆愯В鏋愩�戠敱
a
=(2,-2),
b
=(2,-1),
鍙緱
a
+
b
=(4,-3),
鍒?/p>
|
a
+
b
|=
4
2
+(-3)
2
=5.
鏁呴�?/p>
C.
5.
鐩寸嚎
3
x
+2
y
-6=0
鐨勬枩鐜囨槸
(
)
A.
3
2
B.-
3
2
C.
2
3
D.-
2
3
5.B
銆愯В鏋愩�戠洿绾?/p>
3
x
+2
y
-6=0
锛屽彲鍖栦负
y
=-
3
2
x
+3
锛屾晠鏂滅巼涓?/p>
-
3
2
鏁呴�?/p>
B.
6.
涓嶇瓑寮?/p>
x
2
-9<0
鐨勮В闆嗕负
(
)
A.{
x
|
x
<-3}
B.{
x
|
x
<3}
C.{
x
|
x
<-3
鎴?/p>
x
>3}
D.{
x
|-3<
x
<3}
6.D
銆愯В鏋愩�戠敱
x
2
-9<0
锛屽彲寰?/p>
x
2
<9
锛岀殑
-3<
x
<3.
鏁呴�?/p>
D.