Gia sư Thành Được
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Câu 102 Giải phương trình
1/ log3 2 x 5 log 1 x 1 log3 x 5
9
4/ 2 x 8 4 x 6.2x 8 0
1
2
2/ 2log 2 3 log 2 3 3 2 3/ log2 2 x log 22 x log 4 16 x 4
x
x
5/ 12.4 x 2 6 x 2 6.9 x 2 0
6/ lg2 100 x 2lg x 7lg10 x 3 7/ ln 2 x 2 3ln ex 6 4ln x
8/ log 22 x 1 6log 2 x 1 20 0 9/ 2.52 x1 29.10x 5.22 x1 0
2
log 225 x
log125 x x
18/ lg x lg x 90 1 2lg x 2
19/ 25.54 x1 4.52 x 9 0 20/ log 22 4 x 3log 2 x log 2 2
x2
21/ 2.25x 51 x 2 0 22/ 2 .3
2
23/ log
2
2
x
2
x
2
26/ log 5 2 x 1 log 5 x 1 3log125 5 x 1 log 1 x 1
2
2
2
4
25
27/ 2 x 16.22 x 20 0
29/ log
x 1 log
2
2
30/ 42 x - 2.4 x
32/ 8x
2
x
2
x
4
4 x3 4 x 2 4 x 2 log
2
1
2
x
x log 2 x 1 1 log 2 2 x 1
2
1
Gia sư Thành Được
34/ log 9 x log 3
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2
2 3
x2 2 x3
80 0 41/ 3ln 2 x 1 24ln x 1 3log3 27 0
x
x2 2 x3
39/ 2 x4 2 x2 5 x1 3.5 x
42/ 32 x 9 x 1 4 42 x 16.23 x 2 0
44/ 2 2 32.
2
2sin2 3x2sin2 4 x
5 2
x2 2 x 4
2 1
47/
3 x2 x 2
5 2 0
3 2 2 0
59/ 4 x3 2 x7 17 0 60/ log 3 x 1 x 2 4 x 1 1 log 9 x
61/ 8log 22
63/ 2 x
2
x
2 x 1 3log 2
2
1
2 0 62/ 2 x3 3x 5 x6
2x 1
22 x x 3 64/ log32 ( x 1)2 log9 ( x 1)12 log 5 25 0
2
65/ 4.9 x1 3 22 x1
66/ 3 2 2 10 2 1 1 0
x
x
x 3 log 2 3x 7 2
x2
71/ log 21 (4 x) log 2 8 72/ 22 x1 22 x2 22 x3 448
8
2
73/ log
2
1
2
4
x
2 x 2 6 x 3
2
6
75/ 3
x 1
1
80/
81/ 9log3 (1 2 x ) 5 x 2 5
6
3x 1 3
76/ log 4 3 1 .log 1
16
4
4
2 x 2 6 x 3
2
5
x 1
74/ 3
3x
.2 x 2
x
2 1
87/ 4x
2
36.3x
2 x3
2log 2
3
1
89/ 9 x 2 x 2
3
2
10.2x
3
3
x3 1
3 0 86/ log3 log 2 x log3
3 90/ log3 x 2 1 2 log 1 x 3 log 2015 2015 .
9
1
92/ log 3 x 2 3x 27 log 3 81x log 3 9 x
2
x log3 9 x log81 x4 6
94/ log 2 x 2 log x 2 0 95/ log x 16 log2 x 64 3
2
2
2x
96/ log5 2 x 15 log5 x 10 1 log 1 25 97/: 3.
3
3
5
1
98/ 3.2x 4.2 x1 10
1
x1
12 0
3/ 107 x1 6.1017 x 5 0
x 1
6/ 2x2 3.22 x 26
12
3
7/ log 1 x 7 x 3 8/ 6.4 13.6 6.9 0 9/ 2 3
2
x
x
x
x 1
74 3
2 1
x
x 2 3x 2
0
18/ log 1
x
2
2 2 0
19/ 2 x 2 x1 2 x2 3x 3x1 3x2 20/ log 3
2.3x 2 x2
1
3x 2 x
22/
50 7
23/ 232 x 3.21 x 1 0
x 2 5 x 7
4 x
17.4
50 7
26/ 252 x x
x
2
1
16 0
2 x2 3 x 21
2 5
28/
5 2
92 x x
x1
x
2x 5
.log 1 2 x 5 2 21/
27
3
2x 3
log 1 5 x 25/
x7
2
35/ log 2 2 x 2 3x 1 log 2 x 2 x 2
37/ 2
9 x 7
15/ 9.4 x 5.6 x 4.9 x 16/ 35 x2 4 5.35 x2
14/ log 4 x log 2 (4 x) 5
x
4