PH6NGGD&BT HUYfN TRAN VAN TH<ft KY Tffl CHQN HQC SINH L0P 9 THCS GlAl TOAN BANG MAY TfNH CASIO NAM HQC 2013-2014 Diem bai thi Bang so B3ng chfr H9 tan gi£m khao 1. 2. Phach Ch& $: 1. Thi sink ghi day du cdc muc orphan tr&n theo huong ddn cua gidm thj 2. Thi sink lam bai tnfc tiip vao ban d& thi cophdch dinh k&m nay. 3. Bai thi khdng dupe viit bang muc do, but chl; khdng dupe lam hai mau imfc. Phdn viet hong, ngoai cdch dung thu&c gach cheo, khdng dupe toy x6a bang bat cu cdch gl k£ ca but xda. Bail: Tinh gain (lung gid tri cua cac bieu thurc sau: -cos2 55°.sin3 70° - 10cot250°.cot65 2°3° ^ ^ 1+2V2-V3-V9 V} "~ cos3 48 Dap so: A » : B « Bai 2; Tim tit ca cac s6 co dang 34^5^ chia h^t cho 36. T6m tfit each giai °.cot370° Dap so Bai3; a) Tinh gid tri bilu thiic: M = 2,,2 A~2—2 4x t 2xyz v6. x = 0^2 . y = ^23 . z = 2^23 -4y z -xyz Dap so: ~ : M= (5,2x-42,ll + 7,43).l- b) Tim x, biet: 2. = 1321 (2,22 + 3,1)^-41,33 Dap so: X "~" .».*• ** .«.* .4 »* *»•*.««*. • *• ».»* Bai4; Cho biet da thiic Q(x) = x4 - 2x3 - 60x2 + mx -186 chia het cho x + 3. Hay tfnh gia tri cua m roi tim tat ca cac nghifm cua Q(x). Tom tit each giai I Bap s6 BaiS; Cho d§y so {Un} nhur sau: Un = (s+2>/6)r+ (5-2^ v6i n = 1,2, 3, a) Chung minh rang Un+2 + Un = 10Un+i vod V n = 1, 2, 3, T6m tSt cdch giai b) L$p mot quy trinh bim phim lien tuc de tinh Un+2 v6i n £ 1 (neu ro dung cho loai may nao). Quy trinh bam phim c)TmhUli;U12. Dap so: I: Cho tarn giac ABC vai duong cao AH. Bi6t ^C=45°,BH = 2,34cm, CH 3,21cm. a) Tinh gin dung chu vi tarn giac ABC (chinh xdc den 5 chu so th|p phan). Tom tat each giai b) Tinh gan dung b&i kinh ducmg tron n§i ti£p tarn gidc ABC (chinh xac din 5 chu s6 thap phan). T6m t^t cdch giai Bap so . lam hai mau imfc. Phdn viet hong, ngoai cdch dung thu&c gach cheo, khdng dupe toy x6a bang bat cu cdch gl k£ ca but xda. Bail: Tinh gain (lung gid tri cua cac bieu . TRAN VAN TH<ft KY Tffl CHQN HQC SINH L0P 9 THCS GlAl TOAN BANG MAY TfNH CASIO NAM HQC 2013-2014 Diem bai thi Bang so B3ng chfr H9 tan gi£m khao 1. 2. Phach Ch& $: . 10cot250°.cot65 2°3° ^ ^ 1+2V2-V3-V9 V} "~ cos3 48 Dap so: A » : B « Bai 2; Tim tit ca cac s6 co dang 34^5^ chia h^t cho 36. T6m tfit each giai °.cot370° Dap so Bai3; a)