2022-2023学年河北省秦皇岛市卢龙县七年级（下）期末数学试卷（含答案）

2022-2023(T)

i.)

A.B.M,&Z|B],SLâsSfe.

c.RWOD.Tffirt<JaJRW-&M^B&W5Nï

2.2Wft()

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

3.Wfô&()

A.5^8A2B.2A5A4C.4A3A5D.8A14A7

6.$D^a<b,)

A.a+3<b+3B.a2<abC.2a<2bD.-->--

33

7.#nS,MAB,CDfàg/f-tiO,OE1CD-f-ÆO,Z1=40°,

BiJzAOCWM()

A.50°

B.120°

C.130C

D.140°

8.)

A.a2•a3~a6B.x+x~x2C.(3x)2=9x2D.(m3)2=m5

9.815550-0TO^itiœ«/ï^8.1555x1O10,“0”)

A.4B.6C.7D.10

10.tlll(x+m)lj(x+4)l^^tr0l'^^.vW--?^r!li,WbnÉWAt)

A.-4B.4C.0D.1

(k+k+•••+=

11.%k}jsE&%i,JHiJw()

k'kk

A.k2kB.k2k+1C.2kkD.k2+k

12.M>=«AH^OIJHII

A.RWZ.B.c.zwiD.Z^HT

13.WJzl+z2+)

C.135D.180

14.)

A.zLl-^^2

B.Z23gz3

C.Z1±jz3

D.1

15.WWM#”iw^:.

16.“xû<j2fê-J53fô^*T6”,.

17.ÆAÂFCf,^ZÂ=60°,zfî=3zC,______=M.“<

Æ”)î£W)

18.,(±A“tm”.ws£“M”)

19.=«-fmiOO’,.

20.5ër^X“a>°»,KOa______

I2x—3<1

21.HïÇ»;

(l)2ax2-18a3;

(2)2a2b—8ab+8b.

22.i-IM;

(1)—2—2022°—(|)“2;

(2)20222-2021x2023.

23.

(l)2çl_5^1<i;

(■3x+2<4x

il..................................................Il।>

-5-4-3-2-1012345

4

24.y=8’“*”

4

(1)M“^”È^3,fMâaS“/”q:

(ûX~ry—o

a.

25.M,ÆAÂ5C41,AB//DG,Z1+z2=180°.

(l)^iIE:AD//EF-,

(2)5grDG^ft^ADC,z2=140°,j£zEFCâ<JJ®ifc.

26.BMW,WUW20ftflBW15#'^380Æ:ÏÏ

MAWjiFn15W5M&10M280je.

n:

(2)W^A./T|W^HnA100^,^®?ffi>FSÜ900Æ.A

1.A

(imA,

B,èêêtMfe.,

C>MjÜèËYÎT,

D.r±|âj-¥®rt,MWW-^Wœi,

i&fë:A.

W«MW'ÆS.marnam^www^minr.

w±M^ifr^5ësw>,W£a>wnmt»m&mi

2.[>^]A

[MlM:2°=1.

ifeijt:A.

3.[^^]A

Œ-WlM:2+7<8,A^'èM=^l^,

2+4>5,W^.t;

4+3>5,TO^jS:;

8+7>14,

ï!fci&:A.

4.[«]A

tmi(Wil

(W^l

^■:A.g£BCÜLhfi<]ft,

C.^HWWW,

D.^ACÜL±.m,

Sfci&A.

5.A

(W-IJTIW-:ÈB&ftPQ1MN,

p$\\PQ&.W&tfj&Ig.,

Skiâ:A.

6.[^]B

[wt/r1ft?;•••a<b,

•’•CL+3<b4-3,

A

•■a<b,

■•■a2<ab(a>0),a2>ab(a<0),ç&a2=ab(a=0),

'■a<b,

:.2a<2b,

••■a<b,

_a_b

"~3>~3’

fôÜâ:B.

MWrW.

ï^i)R-4-M|s]W-WWï^-7,W«.

7.(^aic

[Wffil1W:•■•OE1CD,

AZ1+^BOC=90°,

vZ1=40°,

••■ZBOC=90°—Z1=50°,

v^BOC+^AOC=180°,

.-.^AOC=180°-Z.BOC=180°-50°=130°.

C.

8.C

[WW][#W]

I^WÛWi,W^J^MmfJWjis^

OJfô$g.ROIÔWlW.

«iÉlW.

[w-g]

W:A.a2-a3-a5,MlA'f'W'nfê'LlS;

B.x+x=2x,AiB

C.(3x)2=9x2,AiCffi'â-Sjfe;

D.(m3)2=m6,

AÜ&C.

9.«

[WWJW;•••8.1555x1010^WJM^81555000000,

•■•»“0”

Akiâ:B.

JE8.1555x

ân>oitf,n^/L,/b^â^lÉJJs^JUà.

10.[^MlA

[WWJW:(x+m)(x+4)=x2+(m+4)x+4m,

vjHF^'â-XIÏÏ—'M,

■•.m+4=0,

•■•m=—4.

ÜàÜfc:A.

pmiüJVfW^x^rüi,4^xïjiiâ<]fÆW0,cpnj^mM.

H.[^JA

(fc+fc+-+fc)k=(k•fc)fc=(fc2)k=k2k

[WW1W:

ktk

itiî&A.

12.[^]B

[WW]W:Ï>1-^,

o5

^x>6-2x+4,

Wx+2x>6+4(ifcÿ®Z^NI).

■â'-jf-FîJïfêJJj,f’}3x>10.

ftOtfShWx>^.

M:B.

sai”r^WïWnr.

-7G-2VRÊOT5ÊJ*.,

M»^1.

13.[^]D

[W1W:$11»:

ÉSWI:zl+z4+z5+z8+z6+z2+z3+z9+z7=540°,

•••Z4+Z9+Z6=180°,

XvZ5+Z7+Z8=180°,

•••zl+z2+z3+180°+180°=540°,

.-.zl+z2+Z3[W^JE180°.

OtâtD.

Hfê^Jnr/Û+z9+z6=180°,

z5+Z7+Z8=180°,

14.[^]B

(wwiw-:

.-.zC=ZD=Zi4=ZB=Z4EF,

vZCEG+^DEF=90°,zCEG+zCGG=90°,

.-.ZCGG=Z.DEF,

■■■Z3+ZCG£=180°,Z1+£DFE=180°,

••■Zl^Z3^X^Æ^lJÆ;

vZ.AHG=/.BHK,Z.AGH+Z.AHG=90°,Z.BHK+Z.BKH=90°,

.-.^AGH=/.BKH,

•••Z3+Z.AGH=180°,Z2+£BKH=180°,

•••z2=Z3.

MG.

^GH,tëfëMÆHWfôMnr&zCGE=Z.DEF,^AGH=^BKH,

««MW,

15.[^M]MW'Nimft.

[W-tlTlJW:JEifr®“W&5#”“M-m-”W

^iÈR^ÆS#,

BPW^.

*B±>WTfà®âûÆj£.“Sn^-rn-”â^X.

16.[^M]2x—3<6

(WW)W:ÉMW:2x—3<6.

2x—3<6.

Otf'JJTJXK2fê,BP2x>miJffiM3iW'h^6

jltteMWTÈ»|n1®iÈatB-7ü-W^,ŒW.W

17.[^]MÆ

[MIJT]W;"^A=60°,=3/.C,^A+^B+^C=180°,

;.60°+3zC+zC=180°,

WW;ZC=30°,

••■ZB=90°,

■■■^ABC&M-fiW.

fiÆ.

^HÆ^WrtÆ^^180°,ÂfcllUffJgzCÉKj»,WiM^Æ«®BPni.

18.

[WtfrlW:

mWtH.

»HÆWÆôùMEsij.Æ,M=Æ^É<JÆ.

19.[^^]130°

(W-lJf]W:•••z/ICQMzMfiCÔWÆ,S^ACQ=100%

.-./LBAC+/.ABC=100°,

7AD^ft^BAC,BD^-'Az-ABC,

:.Z1=1/.BAC,/.3=^/.ABC,

1

Z1+z2=-^/.BAC+/.ABC)=50°,

zD=180°-(Zl+42)=130°.

130°.

+=100°,SÈ^¥3HWÆ5CWzl=j/LBAC,Z3=

±/iABC,/Affi]nl^<zl+z2-50°,MRHWWrtÆWWWW-.

fâJâÙ^M.

20.a>2

[JWtfrlâ?:{x-a>°®,

2x-3<1@

W:x>a,

WWW:X<2,

-a>0

v-7C-?^25^^Mgx_3<1Æ^,

■■a>2,

a>2.

>)

"%J1ÆM,BPnTWïÜaiftMfëH.

I2x-3<1

21.[ï'r'ii)ft¥:(1)JM^J=2a(x2-9a2)

=2a(x+3a)(x—3a);

(2)®ï^=2h(a2—4a+4)

=2h(a—2)2

=26(a-2)2.

[Wfir](i)ÆWÂH^,

(2)^fêm^Hït,41sJTJBPnT•

£^5waïŒg,zk^>

22.W:(1)-2-2021°-(i)-2

=-2-1—4

=-7;

(2)JM^=20222-(2022-1)x(2022+1)

=20222-(20222-l2)

=20222-20222+1

=1.

[JOrlWWnL

(2)Je^ï^it^20222-(2022-1)x(2022+1),WJffl«J.

23.[^M]W:(1)^~~<1,

2(2x—1)—3(5x+1)<6,

4x—2-15x—3<6,

4x—15x<6+2+3,

-llx<11,

x>—1:

(WW,W:x>—6,

W:X>2,

5W^Mi?a^x>2.

-5-4-3-2-101234^

[OrJ(i)fê^M-jü-&^^»*^W:1

W.

(2)^55iJ^tB^-^W^ÛW»,OOft:RW'K

24.[^](l)LX“/=4®-

3x+y=8(2)

®+®W=4x=12,

X=3,

ÎEx=3RÀ®<#:3-y=4,

m-.y=-l,

{yïlr

(2)5

[WWJ1W:(l){x-y=4®,

3x+y=8@

®+®f#:4x=12,

WW:X=3,

ÎEx=3fÇÀ©W:3-y=4,

WW:y=-l,

{JZ-r

(2)i£hya,

■■x.y<—

■••ÏEx=—yRÀx—y=4W:—y—y=4,

m-.y=-2,

BPx=2,

KÀax+y=8W:2a—2=8,

WW:a=5,

BP^^&5.

5.

(l)(g)+©WtH4x=12,ARHJX,JEx=3RA®^iÜyBPBl;

(2)JEx=-yRÀx-y=4^tHy,M^fBx,ft^tH^BPnl.

WT-HWIP.A^afiWm?(2)ft<jA

w.

25.(l)im