TUYEN SINH VAo LOP 10THPT
Nim hoc 2020- 2021
MON THI: ToAN
lambai: 120phut, khong ki thaigianphdt iJJ
Call 1 (1.0 di~m). Tim diSu kien cua x d~ bieu thirc A=4-3x -~x+ I c6 nghia.
Call 2 (1.0 di~m). Khong sir dung may tinh cam tay, giai phirong trinh sau:
x2 -(3+F2)x+3.fi =0.
Call 3 (1.0 di~m). Cbo ham s6 y =_I_x +2021. Tim cac gia tri cua m d~ ham s6 da
2-m
cho la bam s6 b~c nhAtd6ng bi~n tren R.
Call 4 (1.0 di~m). £)6 thi ham s6 y = ax va duong thkg y = 2x+2 cung di qua diem c6
hoanh dQla 1.Tim gia tri cua a .
Call 5 (1.0 di~m). Cho bi8u tlnrc
- ( 2x+1 Fx J(1+xFx rJ ,. >0 1
B- r - r r -X Vat X - va x =t .
x-sx -1 x+x +1 I+x
a. Rut gon B;
b.Tim x d~B=5.
Cau 6 (1.0 di~m). Nguoi ta d6 them 100 g mroc vao met dung dich chua 20 g mu6i thi
nong dQcua dung dich giam di 10%. Hoi tnnrc khi d6 them mrcc thi dung dich chua bao
nhieu mroc ?
Call 7 (1.0 di~m). Xac dinh tam va tinh ban kinh dirong tron ngoai ti~p hinh chfr nh~t
ABCD bi~t AB =8cm, BC=6cm.
Call 8 (1.0 di~m). Cbo tam giac ABC vuong t~i A, duAB = 4. Tinh HB va He.
AC 3
Cau 9 (1.0 di~m). Cho dutron (C:;t: A, C:;t: B). Cac tiSp tuySn Clla duGQi H la hinh chiSu vuong g6c cua C tren duCH. ChUng minh ring CI=HI.
Call 10 (1.0 di~m). Cho hai dutiSp tuySn chung CD cua hai duE, F Iftnluqt thuQc cac dunb gifra E va F, E:;t: B,F:;t: B) va EF song song vOi CD. GQi P,Q Iftnluqt 1agiao
di~m cua cac c~p dudUOngthkg EC va FD. ChUng minh ring:
a. MCD =MCV;
b. KP=KQ.
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HQva ten thi sinh: S6bao danh ..