Đề đáp án thi thử ĐH lần 4 2011 THPT Lê Xoay

TRrtoNG THPT r,E on rru xoey Niim hgc 2010-2011 l: Cdu rm rutlD4r HQC- IAN rv uON: roAN- BAN KHoA Ho c ryNnrcN Thdigian: I80phfit +m+2 (1) Cho hdm s5 y = xo -4x2 Kh6o srlt sg biiln thi€n vd vE AO tni (C) cua hdm sO (l) vdi m Giast (C) cft Ox tai di€m phen bi$t Xdc ttinh m Oe ninn phing gidi han bdi (C) vi tryc hoanh c6 diEn tich phdn phfa tr€n vd phia dudi tryc hodnh bing l : Cf,u 2: -+=ry l -zGiei phuong trinh: Q+c?tzx, tan x ' sint x cos" r Giaib6t phuong trinh: l' +.F+o > Jt'*' *" u.t' *12 3: Cho hinh hQp dung ABCD.A'B'C'D' c6 *ali >Jmi,3-fr *6 = v ta duqc: 0,25 >mzr' fr*u {u+v>0 ^< o }4=Y [(u -v)' -> r.{,C '0,?5 0,25 aABC.dou o4nh a =a vi BD I I BD - (ABCD) n@ nDl| + Gqi O ld giao'cua AC AotBD A,OLBD + A()A' * + CD' lt = 0,25 =90") d(CD';Qt BD)) 6ae.QDoA'eo A'B d(C;(A' + BD]I' =11tr;(A' BD.})' (vi AO * CO) ' + lrtrl: J{H vudng 96o v6i A'O 0,25 (1) c6 AA'L BD\+ AH (z) BD L BD) Tir(il) v$ (2) a AE L(A'BD', v0y: d(CD";(A'BD)) = AII: AO-sin AOH AO t a = jsrnou"= a I 0,25 0,25 "Jj "Ji Z.T=T I.I*L !v'-z*qJx'-t D$ t =\[7a f = x' -l> t-dt = x& 0,25 t}OI CAn: xlll.D t l0l1 ,:1sff*.='!;Hr;J[*-*] = tt) = i[U' -rl-]rnpr t; ](t"t-Jr"o) 4,25 0,25 0,25 http://www.violet.vn/haimathlx I ry' !t= (xz Xdt +3y.\x*Jffi/y y=0=>M=0 0,25 Xdt y *0+M = ry'U-Jxz +t2y2)= -(rTtryit} 0,25 EItr=4nui(t>0) M=f(t)=# f'(t) = 2-t +z.rlt+t 6(t +4)2.J1+t f'(t)=0 ... ycbt thi: Jtr' o - 4xz + m+Zft= -ttr' -4xz +m+z)& 0,25 b firo -4x2 +m+2)dr=A *45 3-y+(m+2)b=o cr 3Da -20b2 +6(m+ 2) = 913; 0,25 Me b h nghipm cria (2) n€n ba -4b2 + n+2=0 (4) ru lo 1,,=T (3) (4) =+... Bing bi6n thi n: =} M dat GTLN Gi& sri: lzy, fzt'=3r' x' =g c)i ** =* [rt0 0,25 -ld A(a;0) BeOx I B e BC :4x +3y- 16 = gJ MBC vu6ngtei A; = 4, 25 rt+'01 la C e BC 1l +c6;We1 0,25 4, 25 =1b-4y =iv-q{r-+.;)... - 4x2 +3 0,25 XCt sybitin thi n: lirn v-+@ lim u=+o:'x-+