LOP
TUYEN SINH V Ao
10 THPT
Nim hoc 2020 - 2021
MON THI: ToAN
lam bai: 120phut, khong ki thai gian phdt 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
Call 3 (1.0 di~m). Cbo ham s6 y = _I_x
2-m
=0.
+ 2021. Tim cac gia tri cua m d~ ham s6 da
cho la bam s6 b~c nhAt d6ng bi~n tren R.
Call 4 (1.0 di~m). £)6 thi ham s6 y
hoanh dQ la 1. Tim gia tri cua a .
= ax'
va duong thkg
y
= 2x + 2
cung di qua diem c6
Call 5 (1.0 di~m). Cho bi8u tlnrc
- r - r J( r rJ ,.
B - ( 2x + 1
x-sx -1
Fx
x+"x +1
1+ xFx
-"X
I+"x
Vat X >
- 0' va
x
1.
=t
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 dQ cua 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, du<'mg cao AH. BiSt Be
AB
AC
= 4.
= 2Ocm,
Tinh HB va He.
3
Cau 9 (1.0 di~m). Cho du<'mg tron (0), du<'mg kinh AB. LAy di~m C n~m tren du<'mg
tron (C:;t: A, C:;t: B). Cac tiSp tuySn Clla du<'mg tron (0) t~i A va t~i C
d.t nhau
t~i D.
GQi H la hinh chiSu vuong g6c cua C tren du<'mgth~ng AB. .[ la giao di~m cua BD va
CH. ChUng minh ring CI = HI.
Call 10 (1.0 di~m). Cho hai du<'mgtrim (0) va (0') c~t nhau ~i hai di~m A va B. Ve
tiSp tuySn chung CD cua hai du<'mg tron (C thuQc (0), D thuQc (0
LAy hai di~m
E, F Iftn luqt thuQc cac du<'mg tron (0), (0') sao cho ba di~m E, B, F thkg hang (B
nb gifra E va F, E:;t: B, F:;t: B) va EF song song vOi CD. GQi P, Q Iftn luqt 1a giao
di~m cua cac c~p du<'mg thing DA vai EF va CA vOi EF. K 1a giao di~m cua hai
dUOng thkg EC va FD. ChUng minh ring:
'».
a. MCD = MCV;
b. KP=KQ.
--- H~t --HQ va ten thi sinh:
S6 bao
danh
..