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Trang 1

1

Câu 102 Giải phương trình

9

1

2

2/2log 32 x log23x32 3/   2  

log 2x log xlog 16x 4 4/ 2x8 4 x6.2x80 5/12.4x2 6x2 6.9x2 0

6/lg 1002 x2lgx7lg10x 3 7/ 2 2

ln x 3lnex 6 4lnx

log x 1 6 log x1 200 9/2.52x129.10x5.22x10

log 3x18 log 2.3 x153 1 11/log24x2x2log23.2x21

log 4x3.2x 4log 4x3.2x  4 0

2

     14/64.9x84.12x27.16x 0

15/ 2  1 

2

log e x 2 log e x 3 2 16/  2   

log x  3 log 6x  1 1 0

lgxlg x90   1 2 lgx

19/25.54x14.52x 9 0 20/ 2  2

log 4x 3log xlog x 5 0 21/2.25x2 51x2  2 0 22/2 3x x2 4.3x2 3.2 x  12 0

23/  2

2 2

16

log 8.4x32   x 3 4log 2x 3

25/9.43x2 x 197.63x2x 4.93x2 x 10

25

log 2x1 log x1 3log 5x1 log x1

27/2x16.22x 200 28/   2

log 4x 7 log x 2 0

2

2

30/42x2 - 2.4x2x 42x 0 31/  4 3 2   2 

log x 4x 4x 4x2 log x 1 32/8x2x 3.2x2 x 2160 33/ log log  1 1 log 2 1

2

1

2 2

2 xx   x

Trang 2

2

34/log9xlog3 2x 1 1 35/ sin2 sin 22  2sin 32 2sin 42

ln sin 2xsin x  ln 2 37/  2 2 3   2 2 3

2 3   x x 2 3   x x

38/log log32 0

3 9

x

x

 

2x 2x 5x 3.5x 40/9x213x23800 41/ 2    log 27 3

3ln x 1 24ln x 1 3 0

3 x9x 4 4 x16.2 x 0 43/  2

2 lnxln 2x3 0

44/22 32. 2 18 0

x

x

2

log 4 x 3 log 4 x 1 log x1

2 x 17.2x8 3 39x 0 47/

x x

x x

49/5.32x134.15x3.52x1 0 50/log  2 10 9 2 log 2 3 0

3

51/4.32x 1 43.6x 18.4x  0 52/ 5 25

20

53/4x2x13.2x2x2 7 0 54/ 2

2

2

1 log ( 1) log ( 5) log (3 1)

55/ (3x2 )(3x x 3.2 )x 8.6x 56/

3 3

1

x x

x x

57/9x2 45.6x 9.4x1 0 58/ 2

log (x 1) 6log x  1 2 0

log x 1 x 4x  1 1 log x

1

x

x

2

2x 3x  x 63/2x2x 22 x x2 3 64/log (23 x1)2log (9 x1)12log 255 0

65/4.9x13 22x1 66/ 3 2 2  x 10 2 1  x  1 0

Trang 3

3

2 log xlog x.log 2x 1 1 68/

32 0, 25.128

69/2x2x4.2x2x22x 4 0 70/log2 x 3 log2 3x 7 2

71/

2 2

2

8

x

  72/

2 x  2 x  2 x  448

2

4

xx   x  

3 2

x

x x 

75/32x2 6x 36x2 3x 122x2 6x 3 76/ 4  1

4

log 3 1 log

x

5

2log x5log (25 ) 3x  0 78/2.3 9.3 19

0

1 ln

x

79/3 1 22 1 122 0

x

x  x   80/  2 3  2 3 4

81/ log (1 2 ) 3 2

9  x 5x 5 82/ 2 2

log x log x  1 5 0

2

2 log (1 2x 1 ) log (5 x) log (3x) 84/   1

log52 1 2

x

85/9x2136.3x23 3 0 86/

3

2 3

x

x

87/4x2 2x 310.2x2 2x 4 6 0 88/

2log  x  1 x log  x  1 x 3

89/

2

3

x x

x x

 

9 log x  1 2 log x 3 log 2015

3 x 4.3 x  27  0 92/  2 

1

93/4log 3 xlog 93 xlog81x4 6 94/ 2

2

log x 2 log 2x  0 95/log 16 log 64x2  2x  3

5

log 2x 15  log  x 10   1 log 25 97/:

3.2x 4.2  x  10 99/ 2

log x 5log x  6 0 100/ 2 1

13 x  13x 12  0

Trang 4

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Câu 103 Giải bất phương trình

3.7x  7x  4 0 2/:   2 2 2  4 2

10 x  6.10 x  5 0

8.2x  16.2x  12  0 5/

1

3

x x

 

  6/

2 2

2x  3.2x  26

1

2

log x 7x 3 8/6.4x 13.6x 6.9x 0 9/  1 

1

x x

x

3 2log (4x 3) log (2x 3) 2 11/log23.2x 1 2x1

12/log (2 x 3) 2log 3.log4 3x2 13/ 1 1 2

log x 2 log (x  1) log 6  0

14/log4xlog (4 )2 x 5 15/9.4 x 5.6 x 4.9 x 16/

17/ 2 1  x+  2 1  x  2 2  0 18/

2

1 2

x

19/2x 2x1 2x2  3x 3x1 3x2 20/ 3 1 

3

27

x

x

21/

2

1

x x

x x

50 7 x  x 50 7 x  x

23/23 2 x 3.21x  1 0 24/ 2 1 

2

7

x

x x

2

2

x x

x

25 x x  9 x x  34.15 x x

4

x

1

2 log ( 1) 2

1

1 2

x

 

 

30/log (2 ).log (3 )2 x 3 x 1 31/  2

log x2 log 2x  3 0

32/

2

0

x

x x

log 2x 3x 1 log x  x 2 36/4x22x.33x443x4.3x22x 0

37/24 x  17.4 x  16  0 38/: ln 42 x3lnx 4 0

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