... dng x, y, z tho: xyz = 1, chng minh: 20 09 20 09 20 09 1+ x 1+ y 1+ z ữ + ữ + ữ I - PHN RIấNG (3,0 im) Thớ sinh ch c lm mt hai phn (phn hoc 2) Theo chng trỡnh Chun Cõu VI.a (2,0 im) Trong ... v 0 ,9. Tỡm xỏc sut ca cỏc bin c sau Ch cú mt ngi bn trỳng mc tiờu Cú ớt nht mt ngi bn trỳng mc tiờu C hai ngi bn trt THAM KHO ********* ( s 9) THI TUYN SINH I HC, CAO NG NM 2011 MễN: Toỏn Thi ... ********* ( s 2) THI TUYN SINH I HC, CAO NG NM 2011 MễN: Toỏn Thi gian lm bi: 180 phỳt I - PHN CHUNG CHO TT C CC TH SINH (7,0 im) Cõu I (2,0 im) Cho hm s y = x + mx - m - 1 Kho sỏt s bin thi n v v ...