DE HSG MTBT

 CỘNG HÒA XÃ HỘI CHỦ NGHĨA VIỆT NAM SỞ GIÁO DỤC& ĐÀO TẠO Độc lập – Tự do – Hạnh phúc THI VÒNG TỈNH GIẢI TOÁN TRÊN MÁY TÍNH CẦM TAY BẬC TRUNG HỌC NĂM HỌC 2009-2010 Lớp 9 (THCS) Ngày thi: 26/01/2010 Thời gian làm bài 150 phút (không kể thời gian giao đề)    ! " #$%& '()*+ " ,-. , /0 /1 Qui định: 02-345678*92 126:;<=! >9866?:*'0@-.6:3-.:9!97A-.= :9!6?:9"2 B2-*CD-EFG3H9-:I-JKLM@@N JKLM@@O# JKLMP@O# JKLMP@Q# RLM@@O# RLMP@O#2 S2OTM*2 Chú ýI9<@B42 Bài 1I O; U ; U 94!-;4VW X K:;F X 0BM8 X CW U F X YB2O; U 3A X   Z  ;: [  U 94!-;4VW X K:;F X 0@V8 X CW U F X VS2\ Z 8A U  ; Z F X CW Z  ] 98 X 8A U ; Z ;! Z 8A U ; Z A U : ] ;8 X 8A U ; Z F X CW Z  ] 9 4 ] 3A X 3 X ^ X :8 X ;*; ] "2 #W3CW U 3W X  ]  /! Z ?: ] Bài 2I 0_\ X ; U ! U A X *: Z *! Z BC [ -; Z A U 77A: ] 7CW4\ X  16 x x 8 0+ − = 3A Z 9! Z ?: ] 8W Z BC [ -; Z A U 77A"2 1_\ X -; Z   *! ] JK"` 3 2 ax bx c+ + ! Z Ka1"  X  2 x 1− "\ X FC3 X KaM"2 #W3CW U 3W X  ]  /! Z ?: ] 1 Bài 3: \ X A Z  ]  Z -; Z  Z 0@C [ -; Z A U : X ^ X C [ -; Z S8 X 3 X 3:9 [ C X A U M: ] ; U -; Z C U !2  Bài 4: \ Z \ Z K Z ; ] #`020ba121baB2Bbaca0d20db Bài 5: ! ] :C Z %` x x 1 x x 1 2(x 2 x 1) : x 1 x x x x   − + − + −  ÷  ÷ − − +   0_\ Z  Z 4 U : ] ! ] :C Z K`1Y 1@0@3A Z 9! Z ?: ] 1C [ -; Z A U 77A"2 1_\ X K:9!*! ] % Z  Z 4 U :9!2 Bài 6: O; U * X Ke ] W ] 1d@A Z K^; U ;4\ X KA9*A U 7:9 ] *! U 2 X Ke Z MP! Z ; X 3 U  KeW ] BA Z  KeW ] MA Z 8 X KeW ] P MA Z 2! Z :F: X A Z  ] KeP MA Z  W ] B:9! Z \ X *CW U -; Z K^^ X ; ] -; Z K^FKeMA Z W ] B:9! Z 8 X KeBA Z  W ] 1:9! Z 2 ] -; Z Ke;[3 U f #W3CW U 3W X  ]  /! Z ?: ] Bài 7:  Z *! X :N Z  U ^ X Y@24! U 3A Z 9*! ] -` 1@2CW X 4:4C U : ] * U N^ Z  U N8 X NeC Z C U W ] Q8 X g2\ Z :8  Z Qg2 3A Z 9! Z ?: ] 8W Z VC [ -; Z A U 77A"2 Bài 8: 3 X -; Z C U !*CW U 8! Z ^ X 11BC [ -; Z d2 [ 9\ Z ; ]  Z C [ -; Z : ] 8W Z  ` 2 a 2010+ 2 Bài 9: 2 S = 1/ 2/ O; U ! Z Ke Z  Z -:W Z 4CW Z 2/W^  Z Ke-: Z  Z \ Z 3W Z  W Z \ Z  Z Ke4CW Z 3 X 1M2/*4!* U *CW X F X B0S\ X  Z Ke4CW Z ?:9 ! X :W Z Ke-:S@8 X 2\ Z  Z \ Z : ]  Z Ke4CW Z 8 X  Z Ke-:2hA Z 9 π `B 0S 3A Z 9! Z ?: ] 8W Z BC [ -; Z A U 77A"2 #W3CW U 3W X  ]  /! Z ?: ] Bài 10: 4^ U 7^ ]  U *; U iK9*CW X ^ ] I NISKjB9jYM`@ IPKj1S9aMM`@ NIBKaS9jM`@ 02 \ X  U *; U *! ] N  2 12 \ Z  Z \ Z *CW X 4 X ; U ! Z 7 Z N2 LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLHếtLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL • Ghi chú I(;*CD=!2 3 1/ 2/