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Can b{Jcoi thi khong giiii thich gi them.. HQ va ten thi sinh: S6 bao danh: ..[r]
(1)DE TID CHINH THUC
KY THI CHQN HQC SINH GI(~)IcAPHUnN TRUNG HQC CO SO, NAM HQC 2018-2019
Mon: ToAN
Thai gian: Isnphut (khong kJ thai gian giao tJ€) Ngay thi: 19/02/2019
(D€ thi co 01 trang, g6m 05 hili)
So GrAO DVC vA BAo TAO
TIENGIANG
Bili 1.(4,0 tJiJm)
x( ~x +4.Jx -4 +~x -4.Jx -4)
Cho A = ~ (voi x >4)
x2 -8x+16
1) Rut gon A Tim x dS A dat gia tri nho nhat
2) Tim tat cacac gia tri nguyen cuax dS A co gia tri nguyen Bili (5,0 tJiJm)
Trong m~t phang toa dQ Oxy, eho duong thang (d): mx +(2-3m)y + m-l= O 1) Tim diSm e6 dinh rna duong thang (d) luon di qua voi moi s6 thuc m
2) Tim m dS khoang each tu g6c toa dQ dSn duong th~g (d) la 100 nhat,
3) Tim m dS duong thang (d) cit cac true toa dQ Ox, Oy Idnhrottai A, B eho tam giac OAB can
Bili (4,0 tJiJm)
1) Giai phuong trinh: .Jx +9 + 2019.Jx + =2019 + ~(x + 9)(x + 6)
2) Co bao nhieu s6 nguyen duong co chfi s6 abede cho abe-(10d+e) chia hSt cho 101?
Bili (3,0 tJiJm)
Cho hinhthang vuong ABCD co A=D=90° ,AB =9cm, CD = 16cm,BC = 25em DiSm E thuoc canh BC cho BE =AB
1) Chung minh: AED =90° 2) Tinh AE, DE
Bili (4,0 tJiJm)
Cho dirong tron tam duong kinh AB =2R va C la diSm chinh giua cung AB Lay diSm M y tren cung BC (M khac B) GQiN la giao diSm cua hai tia OC va BM GQi H, IIdn luqt la trung diSm eua cae do~ th~ng AO, AM va K la giao diSm eua cae duang th~ng BM vai HI
1) ChUng minh r~ng A, H, K, N cung n~m tren mQtduang tron
2) Xae djnh vi tri eua di~m M tn,n eungBe (MkbaeB)sao cho AK=R:O . _~T -- -Thi sinh khong iluf1c sir dfUlg tlU Ii?u,maytinh ciunlay.Can b{Jcoi thi khonggiiiithich githem.