LOP TUYEN SINH V Ao 10 THPT Nim hoc 2020 - 2021 MON THI: ToAN lam bai: 120phut, khong ki thai gian phdt iJJ Call (1.0 di~m) Tim diSu kien cua x d~ bieu thirc A = "4-3x -~x+ I c6 nghia Call (1.0 di~m) Khong sir dung may tinh cam tay, giai phirong trinh sau: x2 -(3+F2)x+3.fi Call (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 (1.0 di~m) £)6 thi ham s6 y hoanh dQ la Tim gia tri cua a = ax' va duong thkg y = 2x + cung di qua diem c6 Call (1.0 di~m) Cho bi8u tlnrc - r - r J( r rJ , B - ( 2x + x-sx -1 Fx x+"x +1 1+ xFx -"X I+"x Vat X > - 0' va x =t a Rut gon B; b Tim x d~ B=5 Cau (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 d6 them mrcc thi dung dich chua bao nhieu mroc ? Call (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 (1.0 di~m) Cbo tam giac ABC vuong t~i A, du