Chuyên đề luyện thi đại học: Phương pháp đưa về cùng cơ số (tiếp)33959

Chuyên đ luy n thi đ i h c: Ph Lo i Gi i ph ng trình, b t ph 1) 16-x = 82(1 – x) 2) x < 27.9 x 5) 128 = x 9) x −1 = 729 6) x +1 = 18 x −2 x x + 5 10) ( ) x +1 ( ) x + x −1 = ( ) 25 13) ≤2 x −2 x 29) 2 x −5 x −1 = 0,125 30) 32) ( ) - |2 x+1 − x = 32 x−2 − 1) 3.3 1+ 4) + x 7) x −3 +9 x −3 ( 10) 0,5 ( ) 13 x -3 3x -7 0,25 x −1 x −1 ( 3) 21) 3log3 x − 18.x 23) 251+ x− x + 91+ x− x ≥ 34.52 x− x 24) x 22)  - 35  +  + 35  = 12  (   ) ( x )  x 25) + − − + = ( ( ( 29) + ) x - 3x − x + + 2x > x 2x - 3x − x + + (2x ) x Nguy n ) ( 2 26) 3x+1 + 3x-2 - 3x-3 + 3x-4 = 750 28) 2 x −1 + x + x +1 = x + x +1 + x + 31) ) x +1 x +3 =1 20) x − − x x + − x = >0 ( 10 − 3) x+2 19) 32 x − 8.3 x+ − 9.9 = 16 =6 18) 51 + x – 51 – x > 24 x = 125 log 1 −   > 42 9 17) 7x – 5x + < 2.7x – – 118.5x – x+4 2 36) x − 2.2 x x −1 = 12 16) 5x – 3x + > 2(5x – – 3x – 2) x+4 x +1 3) x + x +1 + x + ≤ x −1 + x + x +1 1 6) 3.4 x + x + = 6.4 x + − x +1 9) 4x + – 10.3x = 2.3x + – 11.22x − x+4 1 2+ x x −6 x − 14) 2x + 2x+1+2x+2 = 3x+3x+2+3x+4 13) − ≥ x +1 28) x −1 8) ) =0 −40 x 2) ( + 2) x +1 ≥ ( − 2) x +1 1 2)   2 x -1 x −6 x + 8) 2x – – 3x = 3x – – 2x + 2+ x + x x+2 1 ( )x 16 Lo i Gi i ph 4)  x +5 1x +  x x 33)   =   ng trình, b t ph ng trình sau: x −1 = (0,25).2 x ) x+2 4) x = (0,04) x −3 x −7 1 − x+ x−2 ( ≥ x +1 3) 3x – 1.22x – = 129 – x   x −1 =4 22) 2 x +3 x    1 26) ( ) 2− x + x −3 = 99 + ( ) 4− x 1 1 21)   >   2 2 x +1 x +5 x 25) 14) 16 ng trình sau: x − x −1 ≥( ) 18) 32 x −7 = 0,25.128 x −3 x2 −2 x 17) x −1 ng pháp đ a v c s + 16 − ) x 32) 32 x + x −9 c Toàn Th nh – GV Tr ng THPT Trung Giã DeThiMau.vn x +3>0 x − x+2 > x − 27) x = x +3 log3 −1 - 36.3 x −3 +3= 30) 3.16 x + 37.36 x = 26.81x + 4.15 x + x −5 = 3.52 x + x −9