oi cnixs rnttc Mdn thi: Tofn Thdi gian ldm bdi: 120 phrit, kh6ng ke thdi Sian giao.. Tim m thdng d c6t parabol P tpi hai di6m phdn bi-et c6 c6c hoinh dQ duong..[r]
Trang 1sd crAo DVc vA DAo rAo
NGHE AN
oi cnixs rnttc
rt rHr ruYfN srNH vAo LoP 10 rHPT
NAvr HQc 2or7 - 2018
Mdn thi: Tofn
Thdi gian ldm bdi: 120 phrit, kh6ng ke thdi Sian giao tli
7
b) rim diau kiQn x6 dlnh vi rut gen bi6u thric: p = (+ #) # - ? Cia 2 (2,5 iti€m) ,,
fz*-l=4 1)'
a) Gi6i hQ phucrng e trinh: L
l4x+!=-t -3 b) Giai phuong trinh: 2x2 - 5x + 2 - 0 2- r
l2 c) Cho pu.uboi (p): y=x2 vd rtudrng thEng (d), y =2x+rn-6 Tim m d€' dubng thdng (d) c6t parabol (P) tpi hai di6m phdn bi-et c6 c6c hoinh dQ duong
ciu 3 (1,5 iti€m) {t^(s trn'r ( I '
MOt m6nh vuon hinh cht nhit c6 chi6u dei lon hon chiAu rOng 15 m Niiu gi6m
chi}u dii 2 m vir t6ng chi6u rQng 3 m thi diQn tich m6nh vuln tdng th6m 44 m2 Tinh
diOn tich cria minh vudn 40O
CAu 4 (3,0 tti€m)
Cho <ti€m M nim b6n ngodi rtudng trdn (O ; R) Tri di6m M ke hai tiiip tuy6n MA'
MB v6i iludrng trdn d6 (A, B ld titip tli6m) Qua tli6m A ke dudrng thbng song song vdi
MB c6t ttuong trdn (o ; R) tpi c N6i MC c6t ctudrng trdn (o ; R) tpi D Tia AD cdt MB t4i E
a) Chrmg minh MAOB le fii gi6c nQi ti€p
b) Chrmg minh EM: EB
c) X6c <tinh vi tri cria cli6m M'de BDIMA.
Ciu 5 Q,0 iti€m)
Gi6i phuong trinh: * * 2il1*= - 1
'Jl + *'
uet
Ho vd t€n thi srnh Llwnq Tt.fr^: ffinn* Ehau.Sa-Uao danh hrl.Of tn,