2022-2023學年河北省秦皇島市盧龍縣七年級（下）期末數(shù)學試卷（含答案）

2022-2023(T)

i.)

A.B.M,&Z|B],SLasSfe.

c.RWOD.Tffirt<JaJRW-&M^B&W5N?

2.2Wft()

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

3.Wf?&()

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-?O,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^iti??/?^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.“x?<j2fê-J53f?^*T6”,.

17.?A?FCf,^Z?=60°,zf?=3zC,______=M.“<

?”)?￡W)

18.,(±A“tm”.ws￡“M”)

19.=?-fmiOO’,.

20.5?r^X“a>°?,KOa______

I2x—3<1

21.H???;

(l)2ax2-18a3;

(2)2a2b—8ab+8b.

22.i-IM;

(1)—2—2022°—(|)“2;

(2)20222-2021x2023.

23.

(l)2?l_5^1<i;

(■3x+2<4x

il..................................................Il?>

-5-4-3-2-1012345

4

24.y=8’“*”

4

(1)M“^”è^3,fMaaS“/”q:

(?X~ry—o

a.

25.M,?A?5C41,AB//DG,Z1+z2=180°.

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

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

26.BMW,WUW20ftflBW15#'^380?:??

MAWjiFn15W5M&10M280je.

n:

(2)W^A./T|W^HnA100^,^??ffi>FSü900?.A

1.A

(imA,

B,èêêtMfe.,

C>Mjüè?Y?T,

D.r±|aj-￥?rt,MWW-^W?i,

i&f?:A.

W?MW'?S.marnam^www^minr.

w±M^ifr^5?sw>,W￡a>wnmt?m&mi

2.[>^]A

[MlM:2°=1.

ifeijt:A.

3.[^^]A

?-WlM:2+7<8,A^'èM=^l^,

2+4>5,W^.t;

4+3>5,TO^jS:;

8+7>14,

?!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.,

Skia:A.

6.[^]B

[wt/r1ft?;???a<b,

?’?CL+3<b4-3,

A

?■a<b,

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

'■a<b,

:.2a<2b,

??■a<b,

_a_b

"~3>~3’

f?üa:B.

MWrW.

?^i)R-4-M|s]W-WW?^-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^W?Wi,W^J^MmfJWjis^

OJf?$g.ROI?WlW.

?iélW.

[w-g]

W:A.a2-a3-a5,MlA'f'W'nfê'LlS;

B.x+x=2x,AiB

C.(3x)2=9x2,AiCffi'a-Sjfe;

D.(m3)2=m6,

Aü&C.

9.?

[WWJW;???8.1555x1010^WJM^81555000000,

?■??“0”

Akia:B.

JE8.1555x

an>oitf,n^/L,/b^a^léJJs^JUà.

10.[^MlA

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

vjHF^'a-XI??—'M,

■?.m+4=0,

?■?m=—4.

üàüfc:A.

pmiüJVfW^x^rüi,4^x?jiia<]f?W0,cpnj^mM.

H.[^JA

(fc+fc+-+fc)k=(k?fc)fc=(fc2)k=k2k

[WW1W:

ktk

iti?&A.

12.[^]B

[WW]W:?>1-^,

o5

^x>6-2x+4,

Wx+2x>6+4(ifc??Z^NI).

■a'-jf-F?J?fêJJj,f’}3x>10.

ftOtfShWx>^.

M:B.

sai”r^W?Wnr.

-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°.

OtatD.

Hfê^Jnr/?+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^?^lJ?;

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,t?f?M?HWf?Mnr&zCGE=Z.DEF,^AGH=^BKH,

??MW,

15.[^M]MW'Nimft.

[W-tlTlJW:JEifr?“W&5#”“M-m-”W

^ièR^?S#,

BPW^.

*B±>WTfà?a??j￡.“Sn^-rn-”a^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^,?W.W

17.[^]M?

[MIJT]W;"^A=60°,=3/.C,^A+^B+^C=180°,

;.60°+3zC+zC=180°,

WW;ZC=30°,

??■ZB=90°,

■■■^ABC&M-fiW.

fi?.

^H?^Wrt?^^180°,?fcllUffJgzCéKj?,WiM^???BPni.

18.

[WtfrlW:

mWtH.

?H?W??ùMEsij.?,M=?^é<J?.

19.[^^]130°

(W-lJf]W:???z/ICQMzMfiC?W?,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^￥3HW?5CWzl=j/LBAC,Z3=

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

faJaù^M.

20.a>2

[JWtfrla?:{x-a>°?,

2x-3<1@

W:x>a,

WWW:X<2,

-a>0

v-7C-?^25^^Mgx_3<1?^,

■■a>2,

a>2.

>)

"%J1?M,BPnTW?üaiftMf?H.

I2x-3<1

21.[?'r'ii)ft￥:(1)JM^J=2a(x2-9a2)

=2a(x+3a)(x—3a);

(2)??^=2h(a2—4a+4)

=2h(a—2)2

=26(a-2)2.

[Wfir](i)?W?H^,

(2)^fêm^H?t,41sJTJBPnT?

￡^5wa??g,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^?^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^?W?,OOft:RW'K

24.[^](l)LX“/=4?-

3x+y=8(2)

?+?W=4x=12,

X=3,

?Ex=3Rà?<#:3-y=4,

m-.y=-l,

{y?lr

(2)5

[WWJ1W:(l){x-y=4?,

3x+y=8@

?+?f#:4x=12,

WW:X=3,

?Ex=3f?à?W:3-y=4,

WW:y=-l,

{JZ-r

(2)i￡hya,

■■x.y<—

■???Ex=—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