Bai tap pt mu 1

BI TP PHNG TRèNH M
Dng 1: Bin i tng ng a v cựng c s.
1. 2
x+1
.4
x-1
.
x
x
16
8
1
1
=

2.
1
4
2. 3 . 9
27
x x
x
-
=

( )
( ) ( )
1 6 5
2 1
3) 5 625 4)16 8 5) 0,4 6,25
x x

x
x x
- -
-
-
= = =
( )
2
3 7
1 1
3 cos2 1 2 2 2 1
2 2
4
cos2
1
6)6 216 7)16 0,25 .2 8)2 0 9)3 18 .2 .3 10)10 10 0,11
2.2
x
x x x x x x x x
x x
x
x
-
-
- + - + -
+ -
-
= = - = = + =
( )
( )

2 3
17
tan2
3
5 3
3
tan2
3 3 1
11) 3 0 12)32 0,25.128 13) 3 3 3 14)2 512
81
3
x
x
x
x
x
x x
x
x
+
+
-
+
-
ổ ử
ổ ử
ữ
ỗ
ữ
ỗ

ữ
- = = = =
ỗ
ữ
ỗ
ữ
ữ
ỗ
ỗ
ữ
ỗ
ố ứ
ố ứ
2
1 1 9
2 1 1 23
2
5 9 5
15) . 16)2 2 1 2 1 17) 5 .5 225 18) 128 4
3 25 3
x x x
x
x x x x x
+ + -
+ + +
ổử ổ ử ổử
ữ ữ ữ
ỗ ỗ ỗ
ữ ữ ữ
= - - = + = =

ỗ ỗ ỗ
ữ ữ ữ
ỗ ỗ ỗ
ữ ữ ữ
ỗ ỗ ỗ
ố ứ ố ứ ố ứ
( )
10 5
4 6
2 1 2 1 3 4
3
3
10 5
19)5 3.5 550 20) 2 4 0,125 0,25 21)5 25 22) 16 0,125 .8
x x
x
x x x x x
x
x x
+ +
-
+ - -
- -
- = = = =
( ) ( )
2 1
1 1
1
3 4
3 2 2 2 5 2 1

2 5 1
1
23) 2 2 4 24) 5 625 25)3 9 26) 2 2 .4 27)5 .2 .3 12
2
x
x x
x
x x x x x x x
x x
-
-
+ - + - -
+
ộ ự ộ ự
ờ ỳ ờ ỳ
= = = = =
ờ ỳ ờ ỳ
ờ ỳ ờ ỳ
ở ỷ ở ỷ
9
1 1 1 1 3 2 5 1 2
2
28)3 3 3 9477 29)5 5 2 2 30)2 3 3 2
x
x x x x x x x x x x
+
- + + + + + - +
+ + = - = + - = -
2 2 1 2 3 2 2 3 7 3 1
1 1

31)3.4 .9 6.4 .9 32) 4 10.3 2.3 11.2 33)6 2 .3
3 2
x x x x x x x x x x x+ + + + + + + -
+ = - - = - =
3 3 2 2 1 2 2 9 2 3 2 3 5 5
34)3 .7 3 .7 35)3 .2 12 36)3 .5 5 .3
x x x x x x x x x x x+ + - - - + +
= = =
( ) ( ) ( ) ( ) ( ) ( )
2
6 6 1 1
1 1
1 1 2
37) 2 1 2 1 38) 5 2 5 2 39) 3 2 9 3 11 2
x x
x x x x x
x x
- -
- + + + -
+ +
+ = - + = - - = +
( ) ( )
1 3
2 4 2 28
40) 2 3 7 4 3 41)5 .5 ....5 0,04 42)
x x
x
- + +
-
- = + =

Dng 2: lụgarit hoỏ
2 2 2 4
1
4 2 2
lg
1)3 .2 1 2)2 3 3)2 .3 1,5 4) 10
x x x x x x x x
x
x
- - -
= = = =
3
1
3 log
lg 2 3
1
9)3 .2 72 10) 900 11) 10 12) 3 2
x x
x
x
x x
x
x x
+
-
-
= = = =
( )
2
4

7 5 2 2 1 2 4
2
16)5 7 17) 9.2 8 3 18) 15 1 19)8 4.3
x x
x
x
x x x x x
x
-
+ + - -
+
ộ ự
= = = =
ờ ỳ
ở ỷ
3
2 2
2 2
3 3
8 3log 4
log 3log
3 2 6 2 5
20) 3 21)2 3 3 2
x x
x x x x x x
x
-
-
+ + - + -
= - = -

TRINH XUAN PHONG 0985850455 Page 1 10/27/2013
2
1 lg 5 1
3 5 6 5 lg
1 3
5)2 5 6)3 .8 36 7) 10 8)5 .8 500
x x x
x x x x x x
x x
x
+ + -
- - + +
-
= = = =
3 2
2 2
2 1
log log 3
lg 2 2 1
2
13) 1000 14) 15) 4.9 3.2
x
x x
x x
x x x x
+
- -
-
= = =