2023-2024

OW

1.$é$M#?mwm

3.^émommBO-t,W?M.

-,?&?(<<h?3#,#30#)

1.^r(a+1)2+|Z>-2|=0,4tf^a(.x2y+xy2')-b(x2y-xy2)()

A.3x2yB.-3x2y+xy2C.-3x2y+3xy2D.3x2y-xy2

2.BMCfafa￡AB±,1IT?!J&^,()

A.AC—BCB.AB=2ACC.AC+BC=ABD.BC=-AB

2

3.M,&AABC41,DEiACf?il?$<J?Lfr30￡BC,ACTaD^lIE,ZB=60°,ZC=25°,fllJZBAD

()

A.50°B.70°C.75°D.80°

4.Bftx=2M^*f?-%-ft#f?6Zx-3=llftfl?,)

A.4B.2C.1D.-2

5.M,()

AB

ab0

A.ab<0B.|?|<|Z>|C.b-a<bD.b-a>b

6.2019^?MM±.19%,MHffl^ja^20%.

JWJS?it?!J2rf?M()

x+19x-20x-19x+20

A.--------=----------B.--------=----------

2323

xx?

C.-+19=—20D.—-19=—+20

2323

7.x2+3xy-57,M3x2+9xy-2()

A.2B.24C.34D.44

8.^a2-3a=-2j!j^^^l+6a-2a2W<>3()

A.-3B.-1C.5D.3

9..

A.mx=my,jSP-a.x=yB.|x|=|y|,SP4.x=y

C.$DM--X=8,3P4X=-4D.X—2=y—2,SP^?x=y

2

10.

A.MB.HBc.?￡D.w

-,?/h?3#,#18#)

11.tt?ê#?.Z,mf?￡4^($?-$).WmitBOra,#WW

12.^(/n-2)2+|n+3|=O,WJ'?-?=.

13.9600000km2,?9600000.

14.?WftOftH?OA,OB.OC,&?^AOB=50°,ABOC=20°,WJZAOC?ùOtf-J.

15.(8?+6/?)M^fe(?>0,Z?>0),(3fl+2/?)ffi#,WI'êM^J__________M

X.

16.WJ^^JI?é?^

&4>IWW■

H.MT?ü#?(**??8/J'?,&72#)

17.(8#)5teW,2(3w3-5n2)-(m-3?-4n2)-3(/n-2n2+2m3),m=-|,/?=.

18.(8#)TWiBiHlAlEffi.±ffi<SiJKJ^KmaùW

?.

19.(85?M,WWmiWl,OWMJ?Wf*,

AA^JFttDè>ü??J?^±f?$,Tf?A^JMA&.D&IW

T￡(±>T

TO^ww^ao^/hBt.

(1)SI—?±4T$￡JB^,Ciè?^?

(2)9"W

(3)-^^B,C^zmP^.IWiOUfi^,BP=x^K.M^SWlWOeOim

f?$WA&&W-

(D￡x=0.5P^iJiàA^imfêJft^MJWHt?

?%x=1??fc,P&WiéA&lWlW^K5W

20.(85?M,ttt?fa.AB=12cm,&CMAB±.ttJ~^ti,?D,Efti?fèACfilBCt&*￡.

(l)MCW^A?+?,^!J?=cm;

(2)^AC=4cm,DEéKjiè;

AC12cm),DEf?-|￡^.

i------1____!_______i________r

ADCEB

21.(85?i+W:-l2?20-[2X(-6)+(-4)2]-r(--).

4

22.do5?N,ainw?AfM?Nf?“ia?￡”.M,

M2^A,B,1,JaM,n.

(1)aABW“iafi^”,AB=l-(-3)=4(AB<^RABf?-￡,^TfflR));MN=

(2)?A,M,N^.^,iWffl'amn.

4

(3)%AM=BN,MN=-BM,m$nn{a.

3

AB

-1-—11

-301

23.(10?,ZAOC=50°,ONfèZAOCOM&ZBOC^.ZMONtfljz

/b?

24.(12^b)

(I)

(2)

(3)￡±MW-fc$8cm,WS>bEllW^3cm,

-,?#?(^/b?3#,?30#)

1>B

(W1v(a+1)’+|b-l|=0,

.?.a+l=0,b-1=0,SPa=-l,b=l,

WJIM^=-(x'y+xy1)-1(x'y-xy1)=-x'y-xy1-lx'y+lxy'=-3x'y+xy'.

?B

[￡?]

?WM:?WM:W&??

2.C

—W,B.

[WWlW;A.AC=BC,

B.AB=2AC,MC&faAB'ta,

aAC+BC=AB,WJCnllU^saA￡f±ffi￡-a;

D.BC=^-AB,!fàC%faAM.

2

C.

ra?]

W&JIWL

3>B

[Wtff]W:DA=DC,WgWH?WM?ZDAC=ZC,

^?S^tHZBAC,i+?W.

WW:VDElACmW,

.‘.DA=DC,

/.ZDAC=ZC=25°,

?.?ZB=60°,ZC=25°,

.?.ZBAC=95°,

:.ZBAD=ZBAC-ZDAC=70°,

?fti&B.

4.B

[##T1^x=2RàMar-3=14'?-yb^aW^ig,W^rSBPWHj^m.

[WWlVX=2M^^èü-7C-^S63X-3=1WW

.‘.2a-3=1

W^fl=2

i^Ja:B.

IMI

5,D

[WW]W:è?W,a<0,b<0,fip|>|&|,

J^At,ab>0,

MB+,|4>H>WM?BSm;

MC41.b-a>(),SfcMC^;

?ê^D^,b-a>0,üt^DiE?it;

MD.

?,?<W??ü^.

6-,B

A-19

[^W]>197ê^^1W^——7G;^3fr^^J,207ê^

2

yotü-Tü-^SBP?r.

[WW]

x-19x+20

è?M,

23

W&:B.

[Ml

7>C

[W]?“x2+3xy-5W<^7”^tBx2+3.ry=12,MS^ABPWtH^M.

[WW]Vx2+3xy-5Wtt^7

.’.x2+3xy=l2

:.3x2+9xy-2=3(x2+3xy)-2=3x12-2=34

C.

[?]

8>C

[#ffi]WfWMf?,

[WM]l+6a-2a2=l+2(3a-a2)

=l-2(-3a+a2)

=l-2x(-2)

=5

c.

[?ffi]

MWO?SWimftMWl,

9,D

[Mtff]Wisffl^i&IèM^WBP^.

[WMlA.0M,

B.M|x|=|y|,mx=±y,

c.M--x=8,t?ig^??aWU,^iWiaiW&lU--,fOJ:X=-16,J?fBAOh

22

D.Mx-2=j-2,MIWin±2,W￡üx=j,^TiUiE^.

tt&D.

[?]

^?2.^5Wut.

10,B

[^Wl^JffljE^^?ffi^^SW!ie^MBBppr.

[WM]M:

“g”-èaffiw,ffi“W”m,ffi-^ffi“BTt?ft;

B.

[affltl

#18#)

11,151

[WM1tg^S?ü?X:WS^MWAC,AD,AE,AF,AB,CD,CE,CF,CB,DE,DF,DB,EF,

EB,FBjtlS^,

$n,^C’VC-A’MW?wm

15;1.

[?]

12,5

[WM1M:(m-2)

X@^j(/??-2)2+|?+3|=0

.n]Wm-2=0,n+3=0,

MW-m=2,n=-3,

^TUAm-n=5

5

13,9.6x1.

[WM1&96000009.6x1.

9.6x1.

14,70°?K30°

[WJOC?ZAOB1*1W,ZAOC=ZAOB-ZAOC=SO°-20°=30°,?SOC?ZAOB^F

W,ZAOC=ZAOB+ZBOC=50°+20°=70°.

[WMl?

aoc&ZAOBw,ZAOC=ZAOB-ZAOC=50°-20°=30°,

OC?ZAOB^bW,ZAOC=ZAOB+ZBOC=50°+20°=70°,

^^^J:70°SK30°,

[￡m

15,(a+b)

[#tfrlt?^^f?J3iè￡^^SBPnL

r^wi4s^*4,8<z+6b-2(3tf+2b)8a+6b-6a-4b,,,

[#??1W:è?M,^ifrfàjbh------------------------’-=-----------------=(a+b)BX,

(a+b).

[aBfl

<

16,’

S

[WF!f??#W:MW&W=

“F

M:èfflWffl^±?aù^4’Wtt^=---.

168

#?:MW

?i￥:BPW^.

H,￡72#)

17,-4m+3n,l

(#?r)ttf?JsWft/Mtf?BPpr.

??:B￡=6m3-1On2-m+3/7+4/?2-3m+6//2-6/n3

=-4/77+3/7

m=---./i=—fft

23

B￡=-4/77+3/7

=2-1

=1.

r^m

18,jaiw.

[##T]??aMf??^ifflmm^Bpnr.

HMD

[aim

19>(1)?-ra$IOW/J<(2)

66

12

JH—/J<^yWffl?§9^X;(3)?x=0.5^X,P&MA&élWfO4>M19W;?x=l^X,m

PA#MW28w.

[^?tfrl(1)?Bt?=?4-itaTf-?BPnr;

(2)?-5?±W^-i?T<T$^t/hBtffi￡?9?,

t;

(3)èM^l:IWtbM-#±,&

PS?Bs&mta],^BPnr^jwfm^t^m±^MM-^Te$,

/wf?A;

[W3=

aw^m?^M&m—=|W;

306

(2)^B-SE±W^^-?T^f^^t/hlWé9?.

(DrêiO:

30r+30f+9=15.

**'=I??

@MJH:

30r+30r-9=15

M^z=|

12

g:—'bu*-'btfffil?9

(3)è?ü&:IWtB￡f?-Ot>TfT^f?&a^TBC^??.M

TIT?B&?(5-X)^X.

?^x=0.5^X,

P&bOJB&BWfajy=(/JO,

m^io-WTfiWJi*￡mm(<JO,

13

10<20

???±#JO-.

(3H19

—+—x60-—x60=19

<206J60

:￡x=0.5?,P^IJJèA^fiüBtfSJ?/>M19W.

x=1■rb>k,

P￡I?i!lB&?WIHJ|(/JO,

5-12

?mj?-ffiTO￡üjiàBsmiu—=—(/jo,

1A

5>15

1?1

5156

???.

(211>7

-----1-----1-—x60=—x60=28(^^f1)

<1566j15

x=1PèbgJièA^a<J^fHj</>^28W.

r^m

20-(1)DE=6cm;(2)DE=6cm;(3)j?LMtJ?.

[^](D^Cfè?Af?4>^>AB=12,WHIACWCBW-tè?,?aZXE^J>AC*nBCW+?,WtHDC

ffiCEWK?,BPWW-

(2)AC=4cm,aDMACM,WtBADDCf?jgAB=12cm,WtBCBWJè?,SaE^CB?ü^a,

CE

(3))&AC=acm,DE=DC+CE=-a+6--a=6cm,I)E>-^<,JW-^AC^.

22

[WM:(l)VaCfè??B+￡,AB=12

.’.AC=CB=6cm

E^J*ACflBCf?4>￡

.’.AD=DC=3cm,CE=EB=3cm

:.DE=DC+CE=3+3=6cm

(2)VAC=4cm,￡D>ACa?+?

AD=CD=2cm

VAB=12cm,^E^CB?ù^A

CB=2CE=2EB=12-4=8cm

CE=4cm

DE=DC+CE=4+2=6cm

(3)&AC=?cm

V^D^AC?ùcf3^

1

AD=CD=—acm

2

?.'AB=12cm,^EMCBéKJ+A

.?.CB=2CE=2EB=(12-?)cm

1

CE=(6-—a)cm

2

11

DE=DC+CE=—a+6-—a=6cm

22

.?.DE?j&K?-'b?a,-^AC?^.

21,1.

[W1-1-(-12+16)X(-4)

=-1-4x(-4)

=-1+16

=1.

[?]

???M?;??W&&,^?MaWm+IT;$n^Wfê^,

13

22,(1)n-m-,(2)?MiAMf?'t’?,n=2m+3-,?A&MN^ti,n=-m-6-,?NfèAMfa^fc,n=-m---,(3)

22

9

m-—

m=0m=-65

‘A^1n

n=4n=-21

[Wtfrl(1)

(2)#=#f#Wf?:?M>A,n=2w+3;?SAaftM,n=-6-/?;?N^M.A

-3+w

H0T?n=----------;

2

4

(3)èa&MJWl?i+3|=|n-1|,n-m-—|/?+3|,^MWi?^^BP?T.

(WWJ(1)MN=n-m.

n-m-,

(2)

?M>A,

.’.n+(-3)=2m,

.'.n=2m+3-,

AMN

------------1----------1----------1------------>

-3mn

(2)A^M,+m+n=-3X2,

.*.//=-6-m-.

MAN

________I_______I_____