BI TP PHNG TRèNH M Dng 1: Bin i tng ng a v cựng c s. 1. 2 x+1 .4 x-1 . x x 16 8 1 1 = 2. 1 4 2. 3 . 9 27 x x x - = ( ) ( ) ( ) 1 6 5 2 1 3) 5 625 4)16 8 5) 0,4 6,25 x x x x x - - - - = = = ( ) 2 3 7 1 1 3 cos2 1 2 2 2 1 2 2 4 cos2 1 6)6 216 7)16 0,25 .2 8)2 0 9)3 18 .2 .3 10)10 10 0,11 2.2 x x x x x x x x x x x x x - - - + - + - + - - = = - = = + = ( ) ( ) 2 3 17 tan2 3 5 3 3 tan2 3 3 1 11) 3 0 12)32 0,25.128 13) 3 3 3 14)2 512 81 3 x x x x x x x x x + + - + - ổ ử ổ ử ữ ỗ ữ ỗ ữ - = = = = ỗ ữ ỗ ữ ữ ỗ ỗ ữ ỗ ố ứ ố ứ 2 1 1 9 2 1 1 23 2 5 9 5 15) . 16)2 2 1 2 1 17) 5 .5 225 18) 128 4 3 25 3 x x x x x x x x x + + - + + + ổử ổ ử ổử ữ ữ ữ ỗ ỗ ỗ ữ ữ ữ = - - = + = = ỗ ỗ ỗ ữ ữ ữ ỗ ỗ ỗ ữ ữ ữ ỗ ỗ ỗ ố ứ ố ứ ố ứ ( ) 10 5 4 6 2 1 2 1 3 4 3 3 10 5 19)5 3.5 550 20) 2 4 0,125 0,25 21)5 25 22) 16 0,125 .8 x x x x x x x x x x x + + - + - - - - - = = = = ( ) ( ) 2 1 1 1 1 3 4 3 2 2 2 5 2 1 2 5 1 1 23) 2 2 4 24) 5 625 25)3 9 26) 2 2 .4 27)5 .2 .3 12 2 x x x x x x x x x x x x x - - + - + - - + ộ ự ộ ự ờ ỳ ờ ỳ = = = = = ờ ỳ ờ ỳ ờ ỳ ờ ỳ ở ỷ ở ỷ 9 1 1 1 1 3 2 5 1 2 2 28)3 3 3 9477 29)5 5 2 2 30)2 3 3 2 x x x x x x x x x x x + - + + + + + - + + + = - = + - = - 2 2 1 2 3 2 2 3 7 3 1 1 1 31)3.4 .9 6.4 .9 32) 4 10.3 2.3 11.2 33)6 2 .3 3 2 x x x x x x x x x x x+ + + + + + + - + = - - = - = 3 3 2 2 1 2 2 9 2 3 2 3 5 5 34)3 .7 3 .7 35)3 .2 12 36)3 .5 5 .3 x x x x x x x x x x x+ + - - - + + = = = ( ) ( ) ( ) ( ) ( ) ( ) 2 6 6 1 1 1 1 1 1 2 37) 2 1 2 1 38) 5 2 5 2 39) 3 2 9 3 11 2 x x x x x x x x x - - - + + + - + + + = - + = - - = + ( ) ( ) 1 3 2 4 2 28 40) 2 3 7 4 3 41)5 .5 5 0,04 42) x x x - + + - - = + = Dng 2: lụgarit hoỏ 2 2 2 4 1 4 2 2 lg 1)3 .2 1 2)2 3 3)2 .3 1,5 4) 10 x x x x x x x x x x - - - = = = = 3 1 3 log lg 2 3 1 9)3 .2 72 10) 900 11) 10 12) 3 2 x x x x x x x x x + - - = = = = ( ) 2 4 7 5 2 2 1 2 4 2 16)5 7 17) 9.2 8 3 18) 15 1 19)8 4.3 x x x x x x x x x x - + + - - + ộ ự = = = = ờ ỳ ở ỷ 3 2 2 2 2 3 3 8 3log 4 log 3log 3 2 6 2 5 20) 3 21)2 3 3 2 x x x x x x x x x - - + + - + - = - = - TRINH XUAN PHONG 0985850455 Page 1 10/27/2013 2 1 lg 5 1 3 5 6 5 lg 1 3 5)2 5 6)3 .8 36 7) 10 8)5 .8 500 x x x x x x x x x x x x + + - - - + + - = = = = 3 2 2 2 2 1 log log 3 lg 2 2 1 2 13) 1000 14) 15) 4.9 3.2 x x x x x x x x x + - - - = = = . x x x x - - - - = = = ( ) 2 3 7 1 1 3 cos2 1 2 2 2 1 2 2 4 cos2 1 6)6 216 7 )16 0,25 .2 8)2 0 9)3 18 .2 .3 10 )10 10 0 ,11 2.2 x x x x x x x x x x x x x -. 10 5 4 6 2 1 2 1 3 4 3 3 10 5 19 )5 3.5 550 20) 2 4 0 ,12 5 0,25 21) 5 25 22) 16 0 ,12 5 .8 x x x x x x x x x x x + + - + - - - - - = = = = ( ) ( ) 2 1 1 1 1