《2021.7十一学校2+4初二数学期末》由会员分享,可在线阅读,更多相关《2021.7十一学校2+4初二数学期末(6页珍藏版)》请在金锄头文库上搜索。
1、A- 2020-2021# 4RIHI2D 54t :120 45: 100+M:1. *Jt3, tKE,23 iI.2.A-HAB3*E,#tEfEA.(E54t,34,EHIRESAN ANSE)1.41, PA, PB S N00 BJTAA,B,ZP=70, CHAABE-UZACBEA2.fui,t E.A knNA-2.B kTMA1. itBf# BCLAB,H BC=2.ClAAb,a+b2+33.34 TEK 09 1Wa,b, R3(a,b). #(m,n)*, R 3m +23m +(2n-1)=4.u1 9. :4X4 #M14K%,$iEi MiUkJ1. AB.C
2、E*AUFIeA.AB= 2/5B.ZBAC=90C.AABC ST E10D.AIHRBC AM22B1 D2-3 2 -10AS4 A.B.C.DA.y=-r+1B.y=x- 2xC.y=-D.y=x+7.u1. Yii1 S9 NE i.AiA,B:By=(k+0,r0) 4RI.BEiAA i0.A 8Y4%(2,4). it AfAD1*Ai4sD.tBfBC L xMic,itk0A,AB.#DH0cD*R,j9414LM? : 4-t, KAt 1t=10R),8R?9,2IWAA, B,CWKH1, U AIHTWF . ti 6t9.tn,EE ABCD , %id BC#,
3、 S#GRBE 1E#ExtfBDii24E,tUBE. AI CF=1,BC=2,EE ABCD #Jifi10.x-4x +|=0.2-+2b12. uil.kLC0C ailb AP. ilbAP HAyi=l:/3( tan a =E), 1E #ili9U4 45, 0, A,B:b-i:,VW iiKNEy(t).tano-(1+ V2)tan 9+ 213.AIsin-=0, jJtan-1sin 0+2 cos045AP2260B *1020 x()4812# 14Nea,82t1a,3(Ee3a, .a3416.mntmn) R*Tr MM-LKR-aXr-h)-3=0 6M
4、MK. Hacb. RmaO|0)99GrtA(2,0),B(6.0) .A9RG18.LIQO162. A WA4- , A0=1. P ANE-i).DA AP itAPG, AP=PG, ZAPG=120=. #$( 465)19.1 7(f1O 4 St, st 16 4)cos45sin 45COss302 tan 60-4-3-cot30 + cot 60-cos30(2) #: /Sx+6-V3r+7=1(3) M4$:(4)4a f,H5+sina -cosa=12sinacosa ,tana+cota tfi.24N7 )aul9. AB LOOIL6.(O:3 4. B i
5、. itt% AC, BC.iDBA3 E 1KI:,LZDCA-/ABC,i EDChatIkE, HBEIDC.() Rl:DC Oo MI:(2)=, BE-3, DAK.20.0A2OD 3D21. (4MA7 5)BAITLH#r- (m+2)x+3(m- l)=0.(2) #iKT 1, 5-T0, *m SHHE.-22.(419 8A9 EAAAMNEBFIZTA: y=f(x) Hr0. f(*)-*-1:34r=0 #,PAAAA- I:(3) #A a, b)EPy=x-3.H23. (*8#) EALXESy =-r+hx +e Al-kHy=mx+n 1993M4t A(-3,0) .A-Ky=-r+bx+cJRKNiB(0,3), -y= mx+n AGNRAtc0,1).() #*m, AIb,cSi:(2)PRKy= -x+bx+cRE-A,AAPthE5.,BHAACP # MAS