内容正文:
书书书
! " # $
!"# $%
&1' $%
1.B 2.A 3.D 4.B 5.B
6.(1)∈ (2) (3) (4) (5) (6)∈
(7)∈ (8)∈ (9)∈
7.{-1,1,-3,3}
8.1<犪≤2
9.(:(1)!"13#$%&'(%)'#*+',4-,
./03,5,7,11.123456789:0{3,5,7,
11}.
(2);<=>?
狓=5,
狔=-
{
4
@
狓=5,
狔=4
{
.
∴;90{(5,-4),(5,4)}.
(3)ABC'狔=狓2+2狓-10#DEFG,#H>I
#9:J
,
K7L)0,MN'O
(狓,狔),PJ狓,狔Q
R狔=狓2+2狓-10,S"H,T'-,U3VW678
0
{(狓,狔)|狔=狓2+2狓-10}.
(4)ABC'狔=狓2+2狓-10#DEFG,H#XY
Z>I#9:J
,
K7L)0狔,123VW6780
{狔|狔=狓2+2狓-10}.
(5)9:#K7L)%H,3VW62780{(狓,狔)|
狓<0[狔>0}.
(6)S\D,?]^_.(̀ ab)c#H#9:3V
W6780
(狓,狔)-1≤狓≤
3
2
,-
1
2
≤狔≤1,[狓狔≥{ }0 .
10.(1)!犪=0",#狓=-
1
2
,
$%&'.!犪≠0",#
()犃*+,-./,01)Δ=22-4犪=0,2犪=
1,3"456狓2+2狓+1=0,#狓=-1.73,!犪
=0",狓=-
1
2
;
!犪=1",狓=-1.
(2)8犃*+,-./,#9(1):,犪=0;犪=1,8
犃=,#45犪狓2+2狓+1=0<=>,2Δ=22-
4犪<0,?@犪>1.2犪ABCDEF犪=0;犪≥1.
11.7犕 G./HFIJK,2狓*LB1,2,3,4,5,M
NA6-狓AC65,4,3,2,1,OMNAC01P"
QR;P"SQR
,
TF
,
UVAW%犕 AU+XL
YZF
:{3},{1,5,3},{2,4,3},{1,5},{2,4},{1,5,
2,4},{1,2,3,4,5}.
12.8犪-1=4,#犪=5,3"犃={4,16,32},$%&'.
83犪+1=4,#犪=1,3"3犪+1=犪2+犪+2,S$
%&'
,
[\.8犪2+犪+2=4,#*L犪=-2,3"
犃={-3,-5,4},$%&'.U]犪=5;犪=-2.
13.(1)̂ B_K犪,̀ 犪=2犽+1,犽∈犣,#犪=2犽+1=
(犽+1)2-犽2,ab犽+1∈犣,犽∈犣,2犪∈犃.
(2)̂ BcK4犽-2(犽∈犖),84犽-2∈犃,#de
犿∈犣,狀∈犣,)4犽-2=犿2-狀2=(犿+狀)(犿-狀),f
2(2犽-1)=(犿+狀)(犿-狀).
8犿,狀A_cghP,#犿+狀i犿-狀j6cK,
klmnSF4AoK,pqnF4AoK,SXL;
8犿,狀A_cgSP,#犿+狀i犿-狀j6_K,
klmn6cKpqn6_K
,
SXL.24犽-2
犃(犽∈犖).
!") *+,
&2' *+,-./01
1.C 2.D 3.C 4.D 5.1
6.(1)3犪2-5犪犫+3犫2+4犪-2犫+1 (2)犪3+8犫3
7.(1)8犪2槡犪 (2) 槡犿 犿
8.2 9.犿2狀3
10.rl=
4-3狓,(狓≤-3)
10-狓,(-3<狓≤2),
狓+6(2<狓≤5),
3狓-4(狓>5)
烅
烄
烆 .
11.
2013
4024
12.?&s5FSItA,ItA?&s5uv:
76Δ=32-4×1×1=5>0,U]α≠β.
9,.wx45A>iyKAzy
,
@α+β=-3,
αβ=1,Oα<0,β<0,
U]
α
槡β =
β槡α =
α2
β槡α+
β
2
α槡β=
|α|
α槡β
+
|β|
α槡β
=-
(α+β)
α槡β
=
-(-3)
1
=3.
13.9狓=槡2-1,@狓2+2狓-1=0.73,狓3+2狓2-狓+
2=狓(狓2+2狓-1)+2=2.
14.(1)rl=
2
3犪
-
2
犪+犫
×
(犪+犫)-3犪(犪+犫)
3[ ]犪 ÷
犪-犫
犪
×
犪
犪-犫
=
2
3犪
-
2
犪+犫
×
(犪+犫)-3犪(犪+犫)
3[ ]犪 ×
犪
犪-犫
×
犪
犪-犫
=
2
3犪
-
2-6犪
3( )犪 ×
犪2
(犪-犫)2
=
6犪
3犪
×
犪2
(犪-犫)2
=
2犪2
(犪-犫)2
.
·16·
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