PHONG GIAo DUC VA EAO TAo VINH on rcrAo sAr cffAr LTIoNG - NAvr Hoc z0lz-20r3 I M6n To6n I6p 9 - Thdi gian lim bdri: 90 phrit Blril: (2diAm) (?t-5't,-A a. GiAi hQ phuong trinh : { "'" :" Ix-5Y=3 1 r\ +'). b. 'l'im diOu ki6n x6c dinh vh rut son b '^ (**Ji Sfi-,t; A : | _t it _ IJx+1 ](."|x-I Blri 2: Q diAm) Cho phuong trinh: (2m - D; - 2mx + 1 : 0 a. Gi6i phucrng trinh vfi m: 2 b. Tim gi6 tr! ctra m d0 phucng trinh c6 2 nghiQm phAn bi6t. , ' c. Tim.gi6 tr! ctra m dO phuong,trinh c6 nghiQm thuQc kho6ng (-1,0) Bii 3: (2 diam) Tinh diQn tich hinh chfr nh$t nOi ti6p ducrng trdn tdm O c6 bdn kinh bing 5cm. Bi6t J r.l r\. rdng chi6u dai vd chi6u rQng cria hinh chfr nhdt do hcrn k6m nhau 2cm. Blri 4: Q diem) Cho-3 di6m A, C, B thdng hdng (C nim gifia A,B). TrOn qr)ng mQt ntra mflt phing bcr r\ a \ ,t 3 - r ,: ^ n ^ ! li duong th[ng AB vE hai tia Ax, By vu6ng g6c v6i AB, ldy di6m I thuQc tia Ax. Tia vudng g6c v6i CI tpi C ctttiaBy tpi K. Eulng trdn dulng kinh IC cdt IK tai P. a. Chimg.minh tf gi6c CPKB nQi ti6p. b. Chrmg minh tam gi6c APB vu6ng. c. Gi6 sir A, B, I cO Ainfr. ka" dinh vi tri cria di6m C sao cho diQn tich tri gi6c ABKI lcm nhat. i6u thfc: ) +11 ) Uet PHONG GIAO DUC VA DAO TAO THANH PHO VINH rV rnr xHAo sAr cHAr LTIQNG D4I TRA NAwI Hec z0r2-20r3 OA ttti m6n: Ngfr vin, l6p 9 Thdi eian: 90 phft (kh6ne kO phat d€) Cffu 1 (2 di6m): Hdy cho bi6t nhfing tu ngt in dpm la thenh phAn gi trong c6c"cAu sau: a/ Anh quay lpi nhin con vira khe khd ldc ddu vira cudi. C6 lC vi kh6 tAm d€n n5i kh6ng kh6c dugc n6n anh phAi cudi vay th6i. (l.{guydn Quang S6ng- Chi1c tuqc ngd) b/ Trli oi, chi cdn c6 ndm phrit! . (.{euV6n Thdnh Long .Ldng ld Sa Pa) c/ Niy, b6c c6 bitit mAy h6m nay sirng n6 ben d dAu md nghe r6t th6 kh6ng? . (Kim Ldn - Ldng) d/Lic di, dira con g6i dAu ldng iria,anh - vi ciing li dr?a con duy nh6t cfra, -l anh, chua ddy mQt tu6i. ' (Nguy6n Quang Sattg- Chi6c laqc ngd) C6u2(3di6m): . : :-, Vi6t mQt dopn vdn ngdn (khoang I0-L2 cAu) phdn tfch hinh 6,:rh tho sau: "C6 d6m mdy mira h4 Vdt nria minh sang thu" ( Htu Thinh - Sang thu) CAu 3 (5 tli6m): Hay "e" rd phdn tich tinh huting chinh trong truyQn ngin "Ldng" cua nhi vdn Kim Ldn./. HCt. . GIAo DUC VA EAO TAo VINH on rcrAo sAr cffAr LTIoNG - NAvr Hoc z0lz-20r3 I M6n To6n I6p 9 - Thdi gian lim bdri: 90 phrit Blril: (2diAm) (?t-5't,-A a. GiAi hQ phuong trinh. :" Ix-5Y=3 1 r +'). b. 'l'im diOu ki6n x6c dinh vh rut son b '^ (**Ji Sfi-,t; A : | _t it _ IJx+1 ](."|x-I Blri 2: Q diAm) Cho phuong trinh: (2m - D;. thfc: ) +11 ) Uet PHONG GIAO DUC VA DAO TAO THANH PHO VINH rV rnr xHAo sAr cHAr LTIQNG D4I TRA NAwI Hec z0r 2-2 0r3 OA ttti m6n: Ngfr vin, l6p 9 Thdi eian: 90 phft (kh6ne kO phat d€) Cffu 1 (2