ri uu rHU rHPT QUoc GrA LAN so GrAo DUC VA DAO TAO T1NTI BA RIA wrNG TAU Ndm hqc 2016-2017; M6n: To6n DE CHil\H THUC 76 ) ) Thdi gian tdm bdi 90 phtit, khong ke thdi gian giao d€ n, (De gom 06 rrang) M^ d6 228 Hq vd t6n thi sinh: " Cfiu 1: Gi6 tri cuc ti€u y, - - : cta hdm s0 B A yc, =L ! = I x' - ) 4r 3.r- + yrr=0 rr ld C yrr.= 3: Cho a, b lithai s6 thgc ducrng kh6c 8.07;b>L Ciu 4: Cho hAm sd y = h 1! thoa mdn a4 < a5 D.5 A\ loq.-1;0 0; a + l) Dang thuc ndo sau dAy dring? ^; l) U=a' B.O=a2 C.O=a3 = tf at cong h; b6n (Hinh 1) le tni cua mQt ,A hdm s6 bdn hdm s6 dugc liet k€ bon phuong 6n A, B, C, D du6i ddy H6i d6 lA ham sd ndo? ^1 A.y= Y'+3,r+2 B !=x' +3.r+2 C y=x3 _3x+2 D.y:-xt -3x+2 m o c ( Hinh h l) Il: Tdt ca ciic gi|tri cira tham sd rl d0 hdm s6 l: x3 - mx' +3x+4 ddng bi€n trOn R ld D m