,'' s0 GD&DT HoA eiNH rY rrU TUYEN SINH vAO LOP 10 TRTIONG T}IPT LAC THIJY NAMHQC 2ot7 -2018 DE CHIIVH THTIC on rnr u6N roAN (DANH CHO THi SINH BAN A) Ngny thi: 19 thing 07 nim 2017 MA EE 278 Thdi gian ldm bdi: fP phtit, khdng kA thdi giaru pltdt d€ 1O€ tni cb OS trang, gdm 25 ciu) DIEM SO PIIACH @o Chrt fich HAi ddng thi ghi) GIAM KTIAO Gi6m kh6o Gi6m khflo Cf,u Rrit go.n bi6u thric A=i3+J5 -.J3-J5 -"12 -l Cda Tinh th6 tich Vr ctia khdi da diQn sau, bi6t ring c5c g6c & ctinh dAu bing 900 Cf,u MQt phAnxu&ng theo k6 hoach phii may 1000 bQ qudn 6o th&i gian quy dinh Khi thpc hiQn, m6i ngiy xu#ng may nhi6u hcrn 10 bQ vd hoan thinh k;5 hopch tru6c ngdy Hoi theo kti hopch, m6i ngdy vne ohii mav bao nhi€u Cffu Tim Cf,u Trong mflt ph6ng tqa d0 Oxy, ggi @) va (I) 16n luqt ld dO thi cria hai hdm sd 13 y: "22* _ x+ _ vd y = l*1 (D) va {e c*tnhau tai MvitN Tinh diQn tich tam giiic OM^[ tl tt m de phuong trinh x'-2x-2m+1=0c6 hai nghiQm xt,xz Cffu Tinh dipn tfch S cria hinh thang hinh tga dQ c6c dinh ld (1; 6), (7;6), {4;1) vd (2; 1) vfi r_l Cflu Tim tflp nghiQm cria hQ phucrng trinh sau: {tt*+zy =20r7lxtl l* -2Y = 3xy Trang 1/3 -};4:dde*11278 a thtr chiy gio thi rlugc : bC nudc J Hdi n6u vdi thri nhAt ch6y mQt minh thi thoi eian r ld bao 10u m6i tIAv bC Cflu Rrit ggn bi0u thr?c B_ d:ffi voi *1