BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 1
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
1.
xx
x
2
2
2
loglog
2
4 2.
11log4log
2
5
2
5
xmxx
3.
1
3
3
1
310310
x
x
x
x
0 4. log
x
(log
3
(9
x
- 72)) 1
5.
01ln
2
1
ln
2
xx
x
6.
yyxx
y
3732log
2
8
2
2
2
Với x,y nguyên.
7. CMR :
12 15 20
345
5 4 3
x x x
x x x
8.
2
5 5 5
log 4 144 4log 2 1 log 2 1
xx
9.
31
3
2log 4 3 log 2 3 2xx
10.
11
22
22
ba
ab
ab
Với
0 ba
11.
11
21212.15
xxx
12.
1125loglog2
5
x
x
13.
04log22log1log
3
3
1
3
1
xxx
14.
06,14,025,2
1
xx
15.
11log4log
2
5
2
5
xmxx
16.
1
3
3
1
310310
x
x
x
x
0 17.
1282.2.32.4
222
212
xxxx
xxx
18.
12lg
2
1
3lg
22
xxx
19.
3
8
2
4
1loglog xx
1
20.
243log1243log
2
3
2
9
xxxx
21.
1log1log
1
1
2
xx
x
x
22.
2
3
23
33
2
3
4log3log2log8log2 xxxxxxx
23.
2log
2
log
2
loglog2log2log
2
22
2
22
x
x
x
xxx
xx
24.
22000log1
x
25.
0
132
5
5
lg
x
x
x
x
26.
1
23
23.2
2
xx
xx
27.
163.32.2
xxx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 2
28.
2
1
2
24
log
2
x
x
x
29.
xxx
2.32log44log
12
2
1
2
1
30.
09.93.83
442
xxxx
31.
23.79
12
2
2
2
xxxxxx
32.
xxx
112
2
1
2
1
36
33.
0128
8
1
4
1
13
xx
34.
)1(log1)21(log
5
5
xx
35.
xx
22
loglog2
36.
1)93(loglog
9
x
x
37.
)13(log
1
)3(log
1
2
2
4
x
xx
38.
0
1
)3(log)3(log
3
3
1
2
2
1
x
xx
39.
2
1
2
x 3x 2
log 0
x
40.
2
0,7 6
xx
log log 0
x4
41.
1
3
3
2 log 4x 3 log 2x 3 2
42.
2
2
2x x
x 2x
1
9 2 3
3
43.
x x 2
5 5 5
log 4 144 4 log 2 1 log 2 1
44.
22
2x 4x 2 2x x 1
2 16.2 2 0
45.
xxx 3413154
)
2
1
()
2
1
(
2
46. 2
2x-1
+ 2
2x-3
- 2
2x-5
>2
7-x
+ 2
5-x
- 2
3-x
47.
8433
1
3
1
xx
48.
62.3.23.34
212
xxxx
xxx
49.
1
1
1
)25()25(
x
x
x
50.
0
12
122
1
x
x
x
51. 7
x
+7
x+1
+7
x+2
=5
x
+5
x+1
+5
x+2
52.
1)1(
22
2
xx
xx
53.
xxxxxx 21212
222
15.34925
54.
1
2
2
xx
x
55. log(x + 4) + log(3x + 46) > 3
56.
623 233.4
212
xxxx
xxx
57.
xxxxxxxx
x
3.4352.3.22352
222
58.
12)
3
1
(3)
3
1
(
1
1
2
xx
59.
xxxx
1
42.34
60.
xxxx
433.54
5,0125,0
62. (x
2
+x+1)
x
< 1
63. log
4x-3
x
2
>1 64. log
x
(x
3
-x
2
-2x)<3 65.
0
64
log
5
1
x
x
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 3
66. lg
2
x-lgx
3
+2
0 67. 1+log
2
(x-1)
log
x-1
4 68.
0
1)4(log
5
2
x
x
69.
0
54
)3(log
2
2
2
xx
x
70.
4
1loglog
2
3
2
9
x
x
71.
2
7
1
loglog
7
x
x
72.
5
1
log2log2
5 x
x
73. log
x
2.log
2x
2.log
2
4x>1 74.
1
14
224
log
2
16
25
2
xx
x
75.
0
3
12
loglog
2
2
1
x
x
x
76.
64
1
log
12
1
2)6(log
2
1
2
22
3
2
x
x
77.
x
xx
x
xx
x
2
log)224214()1
2
)(1272(
22
78.
09logloglog
12
2
1
x
79.
2
1
2
24
log
2
x
x
x
80.
)3(log5loglog
2
1
3
139
xxx
81. log
x
(4+2x)<1
82.
4
3
16
13
log)13(log
4
14
x
x
83.
054log
8412
2
x
xx
84.
0
43
)1(log)1(log
2
3
3
2
2
xx
xx
85.
2)16185(log
2
3
xx
x
86.
2
2lglg
)23lg(
2
x
xx
87.
316log64log
2
2
x
x
88.
06log)52(log)1(
2
1
2
2
1
xxxx
89.
1)
3
1
(
]3)2
2
([loglog
1
2
log
2
3
1
2
3
x
x
90.
1
2
23
log
x
x
x
91. log
x
log
9
(3
x
-9)
1
92.
1
3)39(log
1
3
x
x
93.
)243(log1)243(log
2
3
2
9
xxxx
94.
0)1628(
1
5
log)134(
2
5
2
xx
x
x
xx
95. log
2
(2
x
+1)+log
3
(4
x
+2)
2
96. log
2
x+log
2x
8
4 97.
22000log1
x
98.
2)22(log)12(log
1
2
12
xx
99.
)3(log53loglog
2
4
2
2
1
2
2
xxx
100.
3
2log2log xx
xx
101.
3
)5(log
)35(log
3
x
x
a
a
víi: 0<a
1
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 4
102.
)1(loglog)1(loglog
2
5
13
2
5
2
1
xxxx
103. log
2
xlog
3
2x + log
3
xlog
2
3x
o
104.
x
xx
x
x
x
3
35
5
log
)log2(log
3
loglog
105.
2
2
2
2
432
655log)(log65 xxxxxxxxxx
106.
0
352
)114(log)114(log
2
32
11
22
5
xx
xxxx
107.
)112(logloglog2
33
2
9
xxx
108.
0
132
5
5
lg
x
x
x
x
109. Cho 0 < a < b <1. CM BĐT:
22
ln ln ln lna b b a a b
110.
2
0,7 6
log log 0
4
xx
x
111.
2
1
2
32
0
xx
x
log
112.
31
3
2log (4 3) log (2 3) 2xx
113.
2
42
log 8 log log 2 0
x
xx
114.
2
1
1log
2
1
132log
2
2
2
2
1
xxx
115.
3x 1 2x x
2 7.2 7.2 2 0
116.
x x 2
5 5 5
log 4 144 4log 2 1 log 2 1
117. CMR
12 15 20
345
5 4 3
x x x
x x x
118.
xx
xx
2
2
2
2
1
9 2 3
3
119. Cho x +y +z = 0. CMR:
x y z
.2 4 2 4 2 4 3 3
120.
log log x x x .
2
2
4
20
π
121.
22
13
log log
22
2. 2
xx
x
122.
4
2
1162
1
x
x
x
123.
3x
log x log 3
124.
11
15.2 1 2 1 2
x x x
125.
3
log log 9 72 1
x
x
126.
loglog
212
2
1
2
1
23244
xx
127.
2)1(
11
log)1(log
xx
xx
xx
128.
2loglog3loglog
32 xx
129.
2
)4(log
8
2
xx
x
130.
126
6
2
6
loglog
xx
x
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 5
131.
2
65
3
1
3
1
2
x
xx
132.
xx
31
1
13
1
1
133.
13
1
12
1
22
x
x
134.
2551
2
xx
135.
12log
log
5,0
5,0
2
25
08,0
x
x
x
x
136.
48loglog
22
x
x
137.
03loglog
33
xx
138.
05loglog
2
43/1
x
139.
3log2/5log
3/1 x
x
140.
14log.2log.2log
22
x
xx
141.
0
5
34
log
2
2
3
xx
xx
142.
0
2
1
loglog
2
3
6
x
x
x
143.
6log
1
2log.2log
2
16/
x
xx
144.
12log
2
x
x
145.
193loglog
9
x
x
146.
1
2
23
log
x
x
x
147.
13log
2
3
x
xx
148.
2385log
2
xx
x
149.
1log
1
132log
1
3/1
2
3/1
x
xx
150.
101
log1
log1
2
a
x
x
a
a
151.
103
5log
35log
3
avíi
x
x
a
a
152.
0
352
114log114log
2
3
2
11
2
2
5
xx
xxxx
153.
02)5(log6)5(log3)5(log
25/1
55
2
5/1
xxx
154.
3log29log4log
33
2
3
xxx
155.
4
162
2
2/1
log42log4log xxx
156.
0log213log
2
22
2
xxx
157.
xx
x
x
coslogsinlog
2sin
cos
158.
0103.93
xx
159.
8log2
16
1
4
1
4
1
xx
160.
12
3
1
.9
3
1
/12/2
xx
161.
xxx
5555
12
162.
14347347
xx
163.
010.725.24.5
xxx
164.
3
33
8154154
x
xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 6
165.
02515.349
12212
222
xxxxxx
166.
222log12log
1
2/12
xx
167.
1
1
1
2525
x
x
x
168.
0
12
122
1
x
xx
169.
025353
2
22
21
22
xx
xxxx
170.
1
23
23.2
2
xx
xx
171.
04.66.139.6
222
222
xxxxxx
172.
022log.2log
2
2
2
x
x
173.
xxx
6321
11
174.
255102.25
xxx
175.
0log213log
2
22
2
xxx
176.
06log52log1
2/1
2
2/1
xxxx
177.
88
1214
xx
exxex
178.
62.3.23.34
212
xxxx
xxx
179.
x
xx
x
xx
x
2
log2242141
2
1272
22
180.
6
x
x2
93
181.
1
1
2x 1
3x 1
22
182.
2
xx
1 5 25
183.
2x
(x x 1) 1
184.
x1
2
x1
(x 2x 3) 1
185.
2
3
2 x 2x 2
(x 1) x 1
186.
xx
3 9.3 10 0
187.
xxx
5.4 2.25 7.10 0
188.
x 1 x
11
3 1 1 3
189.
2 x x 1 x
5 5 5 5
190.
x x x
25.2 10 5 25
191.
x x 2 x
9 3 3 9
192.
2
8
log x 4x 3 1
193.
33
log x log x 3 0
194.
2
14
3
log log x 5 0
195.
2
15
5
log x 6x 8 2log x 4 0
196.
1x
3
5
log x log 3
2
197.
x
x9
log log 3 9 1
198.
x 2x 2
log 2.log 2.log 4x 1
199.
1
3
4x 6
log 0
x
200.
22
log x 3 1 log x 1
201.
81
8
2
2log (x 2) log (x 3)
3
202.
31
2
log log x 0
203.
5x
log 3x 4.log 5 1
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 7
204.
2
3
2
x 4x 3
log 0
x x 5
205.
13
2
log x log x 1
206.
2
2x
log x 5x 6 1
207.
2
3x x
log 3 x 1
208.
2
2
3x
x1
5
log x x 1 0
2
209.
x 6 2
3
x1
log log 0
x2
210.
2
22
log x log x 0
211.
xx
2
16
1
log 2.log 2
log x 6
212.
2
3 3 3
log x 4log x 9 2log x 3
213.
24
1 2 16
2
log x 4log x 2 4 log x
214.
2
66
log x log x
6 x 12
215.
3
22
2 log 2x log x
1
x
x
216.
x x 1
21
2
log 2 1 .log 2 2 2
217.
23
22
5 11
2
log x 4x 11 log x 4x 11
0
2 5x 3x
218. Cho bpt
22
aa
log x x 2 log x 2x 3
thõa mãn với
9
x
4
. Giải bpt.
219.
1 x x
x
2 1 2
0
21
220.
12
1036
1
xx
x
. Tìm n
0
dương
221.
11
3
3 3 84
xx
222.
7 12
2
51
xx
223.
1
1
1
5
25
x
x
224.
40
1
43
2
2
2
1
3
3
x
xx
225.
2 1 2 3 2 5 7 5 3
2 2 2 2 2 2
x x x x x x
226.
11
5 5 24
xx
227.
9 8 3
7
2
2
1
7
7
xx
x
228.
3
2
log
2
51
x
229.
21
5 5 4
xx
230.
49 6.7 7 0
xx
231.
9 2.3 3
xx
232.
2 1 2 1 2
2 2 2
25 9 34.15
x x x x x x
233.
1 1 1
6.9 13.6 6.4 0
x x x
234.
2
66
log log
6 12
xx
x
235.
log log log
8 19.2 6.4 24 0
x x x
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 8
236.
5.36 2.81 3.16 0
x x x
237.
2.(5 24) (5 7) (5 7)
x x x
238.
13 5 2(13 12) 13 5
x x x
239.
4 2 4
2
1
x
x
x
241.
1
1
11.3 31
5
4.9 11.3 5
x
xx
242.
3 2 3 2 2
xx
243.
2 1 2
2 2 2
4 .2 3.2 .2 8 12
x x x
x x x x
244.
3 1 3 3 1
8 2 4 2 5
x x x
245.
2
log log 4
10000
xx
x
246.
21
4 7.5 2
5 12.5 4 3
x
xx
247.
2
1
2
log 3
2
x
x
248.
2
11
x
xx
249.
2
68
11
xx
x
250.
4 2 2
2
3 ( 4)3 1
xx
x
251.
4 1 2 1
8. ( 8)
xx
x e x x e
252.
x
42
5. 6 0
93
x
253.
2x 2 2
5 5 26
x
254.
x
11
2 3 1
42
x
255.
11
3 1 4
93
xx
256.
x
9 4 2.6
xx
257.
x
9.9 25.12 16.16 0
xx
258.
2x 2
6 3 .4 6.2
x x x
259.
2 2x 2 2
5 .3 3 .5 34.15
xx
260.
x
22
>0
22
x
261.
x
3 3 3 27
0
24
xx
262.
2x
2
2 5.2 4
0
77
x
x
263.
2x
55
>0
3 2.3 1
x
x
264.
22
2x 2 1
3 28.3 9 0
x x x
265.
22
2x 4 2 2 1
2 4.2 2 0
x x x
266.
22
x 1 2
9 10.3 1 0
x x x
267.
2
2
2
x2
1
9 2. 3
3
xx
x
268.
2x+1 2 1
3 2 5.6 0
xx
269.
3x+1 2
2 7.2 7.2 2 0
xx
271.
2
2
log ( 1) 3x
272.
88
3log ( 2) 6log ( 1) 2xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 9
273.
21
log ( 1) log 64 1
x
x
274.
3
log (13 4 ) 2
x
275.
2
log 1
1
x
x
276.
1
2
31
log 1
1
x
x
277.
1
4
31
log
32
x
x
278.
2
1
2
log 1 4 0xx
279.
2
1
5
log 2 1 0xx
280.
2
3
1
log ( 9 ) 1
3
xx
281.
2
2
log (2 1) 1xx
282.
11
33
log 6 log ( 4)xx
283.
11
22
log 5 log (3 )xx
284.
11
55
1
log ( 8) log ( 4)
2
xx
285.
2
log (3 2 ) 1
x
x
286.
3
42
log log 2xx
287.
3
log 2
82
x
x
288.
21
log
32
x
x
x
289.
39
log 2log 2xx
290.
7
7
2log log 4xx
291.
3
24
3log 4log 2xx
292.
2
33
3
log ( 2) log 1
2
xx
293.
2
11
22
log (4 ) log (6 3)xx
294.
2
44
7
log ( 5) log 3
3
xx
295.
2
11
33
log (3 ) log (4 2)xx
296.
2
22
log 3log 2 0xx
297.
2 2 2
21
2
log (2 ) 3log (2 ) 2 0x x x x
298.
4 2 2 4
log log log log 1xx
299.
2
25
log 125 .log 1
x
xx
300.
2
2
2 lg (1 2)lg 2 2xx
301.
2
22
(log ) 3 2(1 3)logxx
302.
2
21
4
log (2 ) 8log (2 ) 5xx
303.
2
5 1 3
5
log (6 ) 2log (6 ) log 27 0xx
304.
2
2
log 1
31
23
log log 2 3 0
2
x
x
305.
2 2 2 3
5 11
2
log ( 4 11) log ( 4 11)
0
2 5 3
x x x x
xx
306.
2 5 2 8
23
2
log ( 2 7) log ( 2 7)
0
3 13 4
x x x x
xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 10
307.
2
2
5
log 0
5(1 )
x
x
x
308.
1
1
5
log (6 36 ) 2
xx
309.
23
3
log log 3 0x
310.
1
log ( ) 2
4
x
x
311.
2
2
log 64 log 16 3
x
x
312.
3
2
log (3 ) 1
xx
x
313.
2
log (5 8 3) 2
x
xx
314.
2
3
log (5 18 16) 2
x
xx
315.
2
3 1 1
33
1
log 5 6 log 2 log ( 3)
2
x x x x
316.
2
33
6log 1 log ( 1) 5 0xx
317.
11
0.5 0.5
log (9 1) 2 log (3 7)
xx
318.
2
log( 3 2)
2
log log2
xx
x
319.
23
23
2
log ( 1) log ( 1)
0
34
xx
xx
320.
22
93
log (3 4 2) 1 log (3 4 2)x x x x
321.
2
(4 12.2 32)log (2 1) 0
xx
x
322.
2
1
1
3
3
11
log ( 1)
log 2 3 1
x
xx
323.
2
1
2
2
11
0
log (2 1)
log 3 2
x
xx
324.
3
23
log 1
1
x
x
325.
2
3
log (5 18 16) 2
x
xx
326.
22
42
log (2 3 2) 1 log (2 3 2)x x x x
327.
3
4 2 2
2 1 2 1
2
22
32
log log 9log 4log
8
x
xx
x
328.
log log 2log 1 3
2
2
3 1 2
23
1
1
3
x
x
329.
2
4 2 2
log x log x log 8
330.
3
2
34
3
log x 2log x log 16
331.
3 9 27
log x log x log x 1
332.
22
lg x 3 7 lg 10xx
333.
2
3
22
2
log x log x 1 log 32
334.
1 3 1
92
3log x 3log 3x log 2
335.
42
log x 1 log 4x
336.
4
2 4 4 1
2
x
2log log x 2log 16 3log x
4
337.
2
2lgx 3lg100x 2 2lg10x
338.
23
lnx +2lnex-lne x lne
339.
2
3logx 3log10x log100 2log100x
340.
22
log x 3 log x 1 3
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 11
341.
2 2 2
log x 3 log x 1 log 5
342.
22
log x log x 1 1
343.
ln x+1 ln x 3 ln x 7
344.
22
log 2x 2 log 4 2x 2
345.
22
33
1
log 2 3x log 1 2x
2
346.
11
22
log 2x 4 1 log 1 x
347.
11
33
log 2x 2 log 4 2x
348.
2
2log x 4 3log10x
349.
23
9 3 3
4log x log x log x 5
351.
22
22
log x 1 log x
352.
22
log x log x 3 2
353.
22
2ln x 3lne x lne 0
354.
23
lg x 2lgx 8 0
355.
2
100
log x 10log x 6 0
356.
7 x 7
log x log 7 log 49
357.
2 x 2
log x log 2 log 4
358.
x
2
log 8 2 x
359.
x
3
log 18 3 x
360.
x
2
log 9 2 x 3
361.
12
1
5-lgx 1 lgx
362.
22
12
1
4-log x 2 log x
363.
x
7
log 6 7 x 1
364.
x
2
log 3.2 1 1 2x
365.
22
lnx.lne ln lnx x e x
366.
4 2 2
2 1 2 1
2
22
8 32
log ( ) log 9.log 4log
3
xx
x
367.
2 2 2 2
log .log 2 log log 4x x x x
368.
2
2
log 64 log 16 3
x
x
369.
2
log 3logx+3
1
log 1
x
x
370.
41
4
3 1 3
log (3 1).log
16 4
x
x
371.
1
1
1
( 5 2) ( 5 2)
x
x
x
372.
2
2 16
11
( ) ( )
39
x x x
373.
1
2
1
1
2
16
x
x
374.
1 2 1 2
2 2 2 3 3 3
x x x x x x
375.
2 2 2
3 2 3 3 3 4
2 .3 .5 12
x x x x x x
376.
31
13
( 10 3) ( 10 3)
xx
xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 12
377.
2
1 3 9
xx
378.
2
2
56
11
3
3
x
xx
379.
2
27
21
xx
x
380.
11
2 2 3 3
x x x x
381.
1
1
( 2 1) ( 2 1)
x
x
x
382.
2
1
2
1
3
3
xx
xx
383.
2
11
x
xx
384.
9 2.3 3 0
xx
385.
2 6 7
2 2 17 0
xx
386.
3
2 2 9
xx
387.
2.49 7.4 9.14
x x x
388.
5.2 7. 10 2.5
x x x
389.
1
4 3.2 4
x x x x
390.
2 2 2
2 2 2
6.9 13.6 6.4 0
x x x x x x
391.
2 1 2
4 .3 3 2 .3 2 6
x x x
x x x x
392.
2
8.3 2
1
3 2 3
x
x
xx
393.
2
2
2
2
1
9 2. 3
3
xx
xx
394.
21
1
11
3. 12
33
xx
395.
1 2 1
2
3 2 12 0
x
xx
396.
2
2.3 2
1
32
xx
xx
397.
22
2
1
5 1 2 3. 5 1
x x x x
xx
398.
2 0,5
31
log log (2 ) 2
16
x
399.
32
log ( ) 1
2
x
x
x
400.
31
3
2log (4 3 ) log (2 3) 2xx
401.
2
0,7 6
log log 0
4
xx
x
402.
4
2 1 1
log ( )
12
x
x
403.
2
3 1 1
33
1
log 5 6 log 2 log ( 3)
2
x x x x
404.
3
log log (9 72) 1
x
x
405.
2
log (5 8 3) 2
x
xx
406.
2
2
log 64 log 16 3
x
x
407.
2
lg( 3 2)
2
lg lg2
xx
x
408.
2 2 2
2 1 2
4 .2 3.2 .2 8 12
x x x
x x x x
409.
6
x
x2
93
410.
1
1
2x 1
3x 1
22
411.
2
xx
1 5 25
412.
2x
(x x 1) 1
413.
x1
2
x1
(x 2x 3) 1
414.
2
3
2 x 2x 2
(x 1) x 1
415.
xxx
5.4 2.25 7.10 0
416.
x 1 x
11
3 1 1 3
417.
2 x x 1 x
5 5 5 5
418.
x x x
25.2 10 5 25
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 13
419.
x x 2 x
9 3 3 9
420.
2
15
5
log x 6x 8 2log x 4 0
421.
1x
3
5
log x log 3
2
422.
x
x9
log log 3 9 1
423.
x 2x 2
log 2.log 2.log 4x 1
424.
1
3
4x 6
log 0
x
425.
22
log x 3 1 log x 1
426.
81
8
2
2log (x 2) log (x 3)
3
427.
31
2
log log x 0
428.
5x
log 3x 4.log 5 1
429.
2
3
2
x 4x 3
log 0
x x 5
430.
13
2
log x log x 1
431.
2
2x
log x 5x 6 1
432.
2
3x x
log 3 x 1
433.
2
2
3x
x1
5
log x x 1 0
2
434.
x 6 2
3
x1
log log 0
x2
435.
2
22
log x log x 0
436.
xx
2
16
1
log 2.log 2
log x 6
437.
2
3 3 3
log x 4log x 9 2log x 3
438.
24
1 2 16
2
log x 4log x 2 4 log x
439.
2
66
log x log x
6 x 12
440.
3
22
2 log 2x log x
1
x
x
441.
x x 1
21
2
log 2 1 .log 2 2 2
442.
2
8
log x 4x 3 1
443.
33
log x log x 3 0
444.
2
14
3
log log x 5 0
445. 446.
1 x x
x
2 1 2
0
21
447.
31
3
2log (4 3) log 2 3 2xx
448.
2
0,7 6
log log 0
4
xx
x
449.
2
5 5 5
log 4 144 4log 2 1 log 2 1
xx
450.
2
1
2
32
log 0
xx
x
451.
86log105log
2
5,05,0
xxx
452.
12log3log
22
xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 14
453.
123log
2
xx
454.
0
1
13
log
2
x
x
x
455.
12
42
xx
456.
2
4
1
log
x
x
457.
1loglog1log
9
9
12
xx
458.
21log
3
1
x
459.
13log
4
x
460. 15
2x + 3
> 5
3x + 1
.3
x + 5
461.
12x6
xlogxlog
6
2
6
462.
125.3.2
2x1xx
463.
0833
2
xx
464.
044loglog
2
2
2
xx
465.
xxx
111
9.46.54.9
466.
424
255
22
xxxx
467.
xxx
2.32log44log
12
2
1
2
1
468.
1
1
1
223223
x
x
x
469.
2
lg2lglg1
3.264
xxx
470.
1log32log
44
2
xx
x
471.
1log.125log
2
25
xx
x
473.
4log.27log.
9
2
xxx
x
474.
13
1
53
1
1
xx
475.
101
2log
2loglog
2
a
x
xx
a
aa
476.
243
3
log4
x
x
477.
233
5lglg2
2
xx
478.
04.66.139.6
xx2xx2xx2
222
479.
x
3
2
110110
xlogxlog
33
480.
xlog
x1
1x
log
2
2
1
481.
2loglog3loglog
32 xx
482.
2)1(
11
log)1(log
xx
xx
xx
483.
2
65
3
1
3
1
2
x
xx
484.
xx
31
1
13
1
1
485.
13
1
12
1
22
x
x
486.
2551
2
xx
487.
12log
log
5,0
5,0
2
25
08,0
x
x
x
x
488.
5)1(log2)1(4log
2
1)1(2
xx
xx
489.
03loglog
33
xx
490.
05loglog
2
43/1
x
491.
3log2/5log
3/1 x
x
492.
14log.2log.2log
22
x
xx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 15
493.
0
5
34
log
2
2
3
xx
xx
494.
0
2
1
loglog
2
3
6
x
x
x
495.
6log
1
2log.2log
2
16/
x
xx
496.
12log
2
x
x
497.
193loglog
9
x
x
498.
1
2
23
log
x
x
x
499.
13log
2
3
x
xx
500.
2385log
2
xx
x
501.
1log
1
132log
1
3/1
2
3/1
x
xx
502.
101
log1
log1
2
a
x
x
a
a
503.
103
5log
35log
3
avíi
x
x
a
a
504.
0
352
114log114log
2
3
2
11
2
2
5
xx
xxxx
505.
02)5(log6)5(log3)5(log
25/1
55
2
5/1
xxx
506.
3log29log4log
33
2
3
xxx
507.
4
162
2
2/1
log42log4log xxx
508.
0log213log
2
22
2
xxx
509.
xx
x
x
coslogsinlog
2sin
cos
510.
3
33
8154154
x
xx
511.
02515.349
12212
222
xxxxxx
512.
222log12log
1
2/12
xx
513.
1
1
1
2525
x
x
x
514.
0
12
122
1
x
xx
515.
025353
2
22
21
22
xx
xxxx
516.
1
23
23.2
2
xx
xx
517.
04.66.139.6
222
222
xxxxxx
518.
022log.2log
2
2
2
x
x
519.
06log52log1
2/1
2
2/1
xxxx
520.
88
1214
xx
exxex
521.
62.3.23.34
212
xxxx
xxx
522.
x
xx
x
xx
x
2
log2242141
2
1272
22
523.
xx
xxxxxxx 3.43523.22352
222
524.
3
1 log
81
x
xx
525.
2
42
11
log ( 3 ) log (3 1)x x x
526.
22
13
log log
22
22
xx
x
527.
xx
xx
2
2
2
2
1
9 2 3
3
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 16
528. 3
x + 1
– 2
2x + 1
– 12
x/2
< 0 529.
2
55
log 2log 15 0xx
530.
33
log ( 1) log (11 ) 3xx
531.
21
11
22
log 4 4 log 2 3.2
x x x
532.
3
log (log (9 72)) 1
x
x
533.
2
5 5 5
log (4 144) 4log 2 1 log (2 1)
xx
534.
39
3
4
2 log log 3 1
1 log
x
x
x
535.
2
42
log 8 log log 2 0
x
xx
536.
2
14
2
3 log log 2 0xx
537.
24
0,5 2 16
log 4.log 2.(4 log )x x x
538.
2
2
4
log log 2 0x x x
539.
5
log 5 4 1
x
x
540.
31
3
2log (4 3) log (2 3) 2xx
541.
32
4
3232
1212
22
xxxx
542.
x
x
x
x
2
2
1
2
2
3
2
2
1
4
2
log4
32
log9
8
loglog
543.
0
43
1log1log
2
3
3
2
2
xx
xx
544.
11
33
11
log [( ) 1] log [( ) 3]
24
xx
545. log
4
log
3
1
1
x
x
<
11
43
1
log log
1
x
x
546.
5x
log 3x 4 . log 5 1
547.
3
x - 2
log ( )
x
51
548.
2
55
(log x) log x
5 x 10
549.
2
3 1 1
33
1
log x 5x 6 +log x 2 log (x 3)
2
550.
2 2 2
log x log x-1 log x - 2
3 . 3 . 5 12
551.
2
1
2
32
log 0
xx
x
552.
)3(log
2
1
2log65log
3
1
3
1
2
3
xxxx
553.
)1(log
1
132log
1
3
1
2
3
1
x
xx
554.
1
1
32
lg
x
x
555.
0
64
log
5
1
x
x
556. 1+log
2
(x-1)
log
x-1
4
557.
0
1)4(log
5
2
x
x
558.
0
54
)3(log
2
2
2
xx
x
559.
4
1loglog
2
3
2
9
x
x
560.
2
7
1
loglog
7
x
x
561.
5
1
log2log2
5 x
x
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 17
562. log
x
2.log
2x
2.log
2
4x>1 563.
1
14
224
log
2
16
25
2
xx
x
564.
0
3
12
loglog
2
2
1
x
x
x
565.
64
1
log
12
1
2)6(log
2
1
2
22
3
2
x
x
566.
0)2210(log
2
2
log
2
xx
x
567.
x
xx
x
xx
x
2
log)224214()1
2
)(1272(
22
568.
09logloglog
12
2
1
x
x
10;4
569.
2
1
2
24
log
2
x
x
x
570.
)3(log5loglog
2
1
3
139
xxx
571. log
x
(4+2x)<1
572.
4
3
16
13
log)13(log
4
14
x
x
573.
054log
8412
2
x
xx
574.
0
43
)1(log)1(log
2
3
3
2
2
xx
xx
575.
2)16185(log
2
3
xx
x
576.
2
2lglg
)23lg(
2
x
xx
577.
316log64log
2
2
x
x
578.
06log)52(log)1(
2
1
2
2
1
xxxx
579.
1)
3
1
(
]3)2
2
([loglog
1
2
log
2
3
1
2
3
x
x
580.
1
2
23
log
x
x
x
581.
02)5(log6)5(log3)5(log
25
1
55
2
5
1
xxx
582.
2)
16
31
2(loglog
5,02
x
583.
32
4log
2
x
x
584.
2
1
2
lg2
1
2
lg4
2
2
2
x
x
x
x
585.
1
3)39(log
1
3
x
x
586.
)243(log1)243(log
2
3
2
9
xxxx
587.
0)1628(
1
5
log)134(
2
5
2
xx
x
x
xx
588. log
2
(2
x
+1)+log
3
(4
x
+2)
2 589. log
2
x+log
2x
8
4
590.
22000log1
x
591.
)2(log3log6log
3
1
3
1
2
3
xxxx
592.
2)22(log)12(log
1
2
12
xx
593.
)3(log53loglog
2
4
2
2
1
2
2
xxx
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 18
594.
3
2log2log xx
xx
595.
)1(loglog)1(loglog
2
5
13
2
5
2
1
xxxx
596. log
2
xlog
3
2x + log
3
xlog
2
3x
o
597.
x
xx
x
x
x
3
35
5
log
)log2(log
3
loglog
598.
2
2
2
2
432
655log)(log65 xxxxxxxxxx
599.
0
352
)114(log)114(log
2
32
11
22
5
xx
xxxx
600.
)112(logloglog2
33
2
9
xxx
601.
0
132
5
5
lg
x
x
x
x
x
3;10;5
602.
)1(log
1
132log
1
3
1
2
3
1
x
xx
603.
2)83(log
3
1
x
x
604.
1
1
32
log
3
x
x
605.
xxxx
993.8
44
1
606.
09.93.83
442
xxxx
607.
0
12
122
1
x
xx
608.
93239
xxx
609.
513)1213(2513
xxx
610.
35)45(235
xxx
611.
1)32(2)347(2)31526(
xxx
612.
1
1
1
)25()25(
x
x
x
613.
1
2
3
1
3
2
xx
xx
614.
11
372
2
xx
x
615.
1
3
1
3
1
.3
72
xx
616.
1
9.68
x
x
617.
xxx
112
2
1
2
1
36
618.
3
2
45.125
5.74
12
xx
x
619.
231523102
55.45
xxxx
620.
)1(log
1
132log
1
3
1
2
3
1
x
xx
621.
)1(log
)3(log
1
)1(log
1
2
2
2
2
2
xx
x
xx
622.
2
1
3
2
log
2
x
x
x
623.
)
13
1
(loglog)
1
13
(loglog
4
1
3
143
x
x
x
x
BẤT PHƯƠNG TRÌNH MŨ VÀ LOGARIT
Hoàng Ngọc Phú Page 19
624.
0
3
12
loglog
2
2
1
x
x
x
625.
0
3
12
loglog
2
2
4
x
x
x
626.
1
3
1
32
2
loglog
1
2
log
2
3
1
2
3
x
x
627.
0log2)13(log
2
22
2
xxx
628.
)1(log.
112
1
log)1(log2
5
1525
x
x
x
629.
x
x
x
x
2
2
1
2
2
3
2
2
1
4
2
log4
32
log9
8
loglog
630.
2
1
18
log
2
2
x
xx
631.
3411243
6.318
xxx
632.
1
23
23.2
2
xx
xx
633.
52428
11
xxx
634.
2
1log
axx
x
a
635.
12log8log22.3log2log4
3
2
33
12
3
222
xxxx
xxx
636.
1log
12
1
log1log2
5
15
2
25
x
x
x
637.
0
2
1
2
3log3log
2
2
3
3
x
xx
638.
12.52
6loglog2
22
xx
xx
639.
13loglog
2
3
13
x
640.
0
64
log
3
1
x
x
641.
2385log
2
xx
x
642.
13loglog
3
3
2
x
643.
13log
2
3
x
xx
644.
193loglog
9
x
x
645.
1
2
1
3
3
1
2
6
1
xxx
646.
275log155log
2
3
2
2
xxxx
647.
15
2
2
log
3
x
648.
x
x
x
1212
1
66
649.
xxx 3log22log
2
650.
2ln34ln2ln xx
651.
1099
22
cossin
xx
652.
0244.62.198
logloglog
xxx
653.
243log1243log
2
3
2
9
xxxx
654.
1log.7log
7
xx
x