Giảicác phương trình sau a. xx −− = 82 74 2 b. 68.3 2 = + x x x c. 7 7 5 125,0.25,032 + − + = x x x d. 2457.5.3 12 = −− xxx e. 5008.5 1 = − x x x f. xxx 6242.33.8 +=+ g. xx 57 75 = h. 553.515 +=+ xxx k. 1224 222 )1(1 +=+ +−+ xxxx l. 2655 31 =+ +−− xx n. 322 22 2 =− −+− xxxx m. 0273.43 5284 =+− ++ xx 1. 5 24 28 = − + x xx 2. 62.42 22 sincos =+ xx 3. 6752793 3 2 132 =+− −− x xx 4. xxx 6.59.24.3 =+ 5. xxx 35.549.225.3 =+ 6. 13 250125 + =+ xxx 7. 027.21812.48.3 =−−+ xxxx 8. xxxx )5,0.(241252.3)5,0.(88 331 −=++ ++ 9. 12122 222 10.50425 −−+−− =+ xxxxxx 10. 022.92 2212 22 =+− +++ xxxx 11. xxx 6.52.93.4 =− 12. 4)32(32 =−+ + x x 13. 14487487 = −+ + xx 14. 221212 = −+ + xx 15. 2 25353 x xx = −+ + 16. ( ) ( ) x xx 2.853712537 =−++ Giải bất phương trình sau 1. 2 6 39 + < x x 6. xx 31 1 13 1 1 − ≥ − + 2. 2 1 65 1 33 2 + −+ > x xx 7. 2) 3 1 .(9) 3 1 ( 2 12 >+ + xx 3. 1 < 5 xx − 2 < 25 8. 8log2) 16 1 () 4 1 ( 4 1 >− − xx 4. 13 1 1 1 22 + − ≥ x x 9. 0 12 212 1 ≤ − −+ − x xx 5. 0 13 239 1 > + +− + x xx 10. 25. 255102 >+− xxx 11. 5.4 010.725.2 ≤−+ xxx 12. 9339 2 −>− + xxx 13. ( 3 1 1 3 )310()310 + + − − −<+ x x x x 14. ( xxxxxx +−++−+− −<++ 222 )15(32)15 1 Giải bpt 1. ( ) 11 2 <+− x xx 2. ( 1)3 72 2 >− − x x 3. ( ) 132 1 1 2 <++ + − x x xx 4. ( ) 112 1 1 2 ≤+− + − x x xx Giải bpt 1. 2log 2 (x-1) ≤ log 2 (5- x) + 1 2. 1)34(log 2 8 ≤+− xx 3. 0)4(log2)86(log 5 2 5 1 <−++− xxx 4. 0) 64 (log 3 1 ≥ + x x 5. )1(log1)3(log 22 −+≥+ xx 6. 2 3 2 )3(log)2(log 8 18 >−+− xx 7. 0))5((loglog 2 4 3 1 >− x 8. 0)(loglog 2 13 ≥ x 9. 0loglog 2 2 2 ≤+ xx 10. 3log 2 5 log 3 1 x x ≥+ 11. 2 3 4loglog 4 ≤− x x 12. 48loglog 22 ≤+ x x 13. 0) 2 1 (loglog 2 3 6 ≥ + − + x x x 14. 1)65(log 2 2 ≥+− xx x 15. 1)93(loglog 9 <− x x 16. 2) 16 15 2(loglog 5,02 ≤ − x 17. 126 6 2 6 loglog ≤+ xx x . )15(32)15 1 Giải bpt 1. ( ) 11 2 <+− x xx 2. ( 1)3 72 2 >− − x x 3. ( ) 132 1 1 2 <++ + − x x xx 4. ( ) 112 1 1 2 ≤+− + − x x xx Giải bpt 1. 2log 2