2..55. (CĐSP QUẢNG BÌNH) LOG1/2(X−1) + LOG1/2(X+ 1)−LOG1/√2(7−X) = 1.....
2
.
.
55.
(CĐSP Quảng Bình)
log
1/2
(x
−
1) + log
1/2
(x
+ 1)
−
log
1/
√
2
(7
−
x) = 1.
.
56.
(B, 2006)
log
5
(4
x
+ 144)
−
4 log
5
2
<
1 + log
5
(5
x−2
+ 1).
.
57.
(CĐTCKT 2006)
3
p
log
1/2
x
+ log
4
x
2
−
2
>
0.
.
58.
(Dự bị B, 2003)
log
1
2
x
+ 2 log
1
4
(x
−
1) + log
2
6
6
0.
.
59.
(Dự bị, 2006)
log
x+1
(−2x)
>
2.
q
2(4
−
log
16
x
4
).
.
60.
(CĐ Y tế Thanh Hoá, 2006)
x
6
√
log
2
0,5
x
+ 4 log
2
√
µ
1
¶
2x−x
2
.
61.
(Dự bị, 2005)
9
x
2
−2x
−
2
6
3.
3
.
62.
(Dự bị, 2002)
log
1
2
(4
x
+ 4)
>
log
1
2
(2
2x+1
−
3.2
x
).
.
63.
(D, 2006)
2
x
2
+x
−
4.2
x
2
−x
−
2
2x
+ 4 = 0.
.
64.
(A, 2006)
3.8
x
+ 4.12
x
−
18
x
−
2.27
x
= 0.
2 = 0.
.
65.
(B, 2007)
(
√
2 + 1)
x
−
2
√
2
−
1)
x
+ (
√
.
66.
(D, 2003)
2
x
2
−x
−
2
2+x−x
2
= 3.
.
67.
(Dự bị B, 2006)
9
x
2
+x−1
−
10.3
x
2
+x−2
+ 1 = 0.
.
68.
(CĐSPHN, A, 2002)
4
x−
√
x
2
−5
−
12.2
x−1−
√
x
2
−5
+ 8 = 0.
.
69.
(Cao đẳng khối A, D, 2006)
3
2x
2
+2x+1
−
28.3
x
2
+x
+ 9 = 0.
.
70.
(ĐHSPHCM, 2002)
4
log
2
2x
−
x
log
2
6
= 2.3
log
2
4x
2
.
£
log
2
(x
+
√
2x
2
−
x)
¤
<
0.
.
71.
(Dự bị, 2004)
log
π
4
.
72.
(CĐKT, 2005) Tìm tập xác định của hàm số
y
=
log
√
5
(x
2
−
√
5x
+ 2).
i
h
.
73.
2.[log
121
(x
−
2)]
2
>
log
1
.
2x
−
3
−
1)
log
1
11
(x
−
2)
11
(
√
.
74.
(CĐSPHN, A, Dự bị, 2002)
log
1/3
(x
−
1) + log
1/3
(2x
+ 2) + log
√
3
(4
−
x)
<
0.
3
x
−
1
.
75.
(CĐSP Vĩnh Phúc, 2002)
log
4
(3
x
−
1).
log
1
16
6
3