[r]
(1)A/ Ph ơng trình mũ:
1) 52x-1+5x+1 - 250 = x =2
2) 54 6 253 4 x
x x =7/5 3) 33 4 92 2
x
x
4) 22x-3 - 3.2x-2 + = x =1 vµ x=2
5) )4 2 ( )
5
( x x x =1
6) 34 4.32 3 0
x
x x =0 vµ x=
4
7) 52x - 7x - 52x.35 + 7x.35 = x =
2
8)
4 10
9
2
x
x
x =3
9) 2.0,3 3 100
32
x
x x
x =
1 lg
3 lg
10) 2x.5x=0,1(10x-1)5 x =
2
11) 3x+3x+1+3x+2=5x+5x+1+5x+2 x =
43 31 log
5
3
12) 2x+2x-1+2x-2=7x+7x-1+7x-2 x =
343 228 log
7
13) 2 1. 2 4 1 x
x x =
2
14) ( 5 6)x ( 52 6)x 10 x =2 vµ x=-2
15) ( 4 15)x ( 4 15)x (2 2)x x =2
16) ( 6)sin ( 6)sin
x x x=k víi: kZ
17) 5.32 7.3 1 6.3
x x x
x x=
5
log3 ;x= log35
18) 22 9.2 22 0
x x x
x x=-1;x=2
19) 8.3x 3.2x 24 6x
x=1 vµ x=3
20) 3x+4x=5x
21) 5x-2=3-x
22) 2 32 1
x x
23) 8x-3.4x-3.2x+1+8=0
24) 2x 3x2 2x 3x2 2x 2x
25) 9 36.3 3 0
x
x x=?
26) 25x-2(3-x)5x+2x-7 =
27) 9x+2(x-2)3x+2x-5 =
B/ Bất Ph ơng trình mũ:
1) 4x 15x 13 )4 3x ( )
2
( 2
x =? 2) 22x-1 + 22x-3 - 22x-5 >27-x + 25-x - 23-x x>8/3
3)
84 3
1
x
x 0<x<1
4) 4 3 . 31 2.3 . 2 6
x x x
x x x x x =?
5)
1
1 ( 5 2)
)
(
x
x
x x 1
6) x2 2x x2 2x x2 2x 15 34
25
(2)7) x xx x
3.2 41
4
8) 4x0,5 5.32x1 3x0,5 4x
C/ Ph ơng trình loga rit:
1) log2(2x-5)2=2 x=1,5;x=3,5
2) log (2 54) log ( 3) log3( 4)
1
3 x x x x=6
3) log2 x 8logx2 23 x=16, x=0,5
4) lg2 20lg
x
x x=10, x=9 10.
5) log 4log4 2
2
x
x x=2
6) log 4log
x
x x=1/4, x=1/4
7) log2(x2-3) - log2(6x-10) + = x=2
8) log3(x2-6) = log3(x-2) + x=3
9) logx(2x2-3x-4) = x=4
10) logx+1(x2-3x+1) = x=4
11) log2(9x+5.3x+1) = x=.?
12) log2(4x+1)=log2(2x+3-6) + x x=0
13) log ( 1) log log ( 2) 2log ( 2)
25
5
5 x x x x= 21/2
14) ( 2)log ( 1) 4( 1)log3( 1) 16
2
3
x x x
x x=2, x=
81 80
15)
2 )
1 (
log
3
x x
x x
2 3
vµ x =
2 29 9
16) x x
)
9 (
log2 x=0 vµ x =3
17) log (9 4.3 2)
3
x x
x
x=0 vµ x=log3(3 15)
18 ) log26 log24
22 2.3
log
4 x x x
x= 1/4
19) 27 3 log9( 3)2
2 log
2 ) (
log x x x x x=5/3
20)
8
2
4( 1) log log (4 )
log x x x x=2 vµ x=2 24
21)
1
2
log2 1
x x
x x=?
22)
2 )
1 (
log
3
x x
x
23) log7(7-x +6)=1+x x=?
24) 2log 21 log5 2log5 0
5x x x x=5
D/ Bất Ph ơng trình loga rit:
1) lg(x+4)+lg(3x+46)>3 x 6 2)log4x-3x2>1 x3;
3)logx(x3-x2-2x)<3 x2; 4)
6 log
5
1
x x
x
2 ;
5)lg2x-lgx3+20 x 0;10 100; 6)1+log
2(x-1)logx-14 x
5/4;2 3;
7)
1 ) ( log
5
x x
x=5 vµ x4 2;
8) 0
5
) ( log
2
2
x x
x
x=4 vµ x5; 9)
5 log log
2 5 x x x1;
(3)11) 14
2 24 log
2
16
25
x x
x x 3;13;4
12)
3 log
log 2
2
1
x x
x x 4;
13)logx(4+2x)<1 x 2;1 1;00;12;
14)log2x64logx2163 x ;2 1;4
1 13
15)log (2 1)log (2 2)
2
2
x x
x 2log25;log23
16) log log 5(log4 3)
2
2x x x x 8;16
1 ;
17) log (3 8)
3
1 x
x
18 )
1
log3
x x
19) log (3 2) log (3 2)
3
9 x x x x x
;1
3 1
;
ÔN TốT NGHIệP NĂM 2008-2009
A/ Ph ơng trình mũ:
1) 52x-1+5x+1 - 250 = x =2
2) 54 6 253 4 x
x x =7/5 3) 33 4 92 2
x
x
4) 22x-3 - 3.2x-2 + = x =1 vµ x=2
11)3x+3x+1+3x+2=5x+5x+1+5x+2 x =
43 31 log
5
12)2x+2x-1+2x-2=7x+7x-1+7x-2 x =
343 228 log
7
2
13) 2 1. 2 4 1 x
x x =
2
(4)5) )4 2 ( )
5
(
x
x x =1
6) 34 4.32 3 0
x
x x =0 vµ x=
4
7) 52x - 7x - 52x.35 + 7x.35 = x =
2
8)
4 10
9
2
x
x
x =3
9) 2.0,3 100
32
x
x x
x =
1 lg
3 lg
10) 2x.5x=0,1(10x-1)5 x =
2
23) 8x-3.4x-3.2x+1+8=0
24) 2x 3x2 2x 3x2 2x 2x
25) 9 36.3 3 0
x
x x=?
26) 25x-2(3-x)5x+2x-7 =
27) 9x+2(x-2)3x+2x-5 =
x =2 vµ x=-2
15) ( 4 15)x ( 4 15)x (2 2)x
x =2
16) ( 6)sin ( 6)sin
x x
x=k víi: kZ
17) 5.32 7.3 1 6.3
x x x
x
x=
log3 ;x= log35
18)22 9.2 22 0
x x x
x x=-1;x=2
19) 8.3x 3.2x 246x x=1 vµ x=3
20) 3x+4x=5x
21) 5x-2=3-x
22)
1
x x
B/ Bất Ph ơng trình mò:
1) 4x 15x 13 )4 3x ( )
2
( 2
x =?
2)22x-1 + 22x-3 - 22x-5 >27-x + 25-x - 23-x x>8/3
3)
84 3
1
x
x 0<x<1
4) 4 3 . 31 2.3 . 2 6
x x x
x x x x
5)
1
1 ( 5 2)
)
(
x
x
x x 1
6) x2 2x x2 2x x2 2x 15 34
25
7) x xx x
3.2 41
4
8) 4x 0,5 5.32x 3x 0,5 4x
(5)1) log2(2x-5)2=2 x=1,5;x=3,5 2) ) ( log ) ( log ) 54 ( log 3
3 x x x
x=6
3) log2 x 8logx223 x=16, x=0,5
4)lg2 20lg
x
x x=10, x=910 .
5) log 4log4 2
2x x x=2 log log
4
x
x x=1/4,x=1/4
7)log2(x2-3) - log2(6x-10) + = x=2
8) log3(x2-6) = log3(x-2) + x=3
9) logx(2x2-3x-4) = x=4
10) ) ( log
3
x x
x
11) log2(9x+5.3x+1) =
12) log2(4x+1)=log2(2x+3-6) + x x=0
20) 2log5x2 21log5x2log5x1 0 x=5
13) ) ( log ) ( log log ) ( log 25 5
5 x x x
x= 21/2
14) 16 ) ( log ) ( ) ( log )
( 3
3
x x x
x
x=2, x=
81 80 15) ) ( log
3
x x
x x 3
vµ x =
2 29 9
16) x x
)
9 (
log2 x=0 vµ x =3
17) log (9 4.3 2)
3
x x
x
x=0 vµ x=log3(3 15)
18 ) log26 log24
22 2.3
log
4 x x x
x= 1/4
19)
8
2
4( 1) log log (4 )
log x x x
x=2 x=2 24
D/ Bất Ph ơng tr×nh loga rit:
1) lg(x+4)+lg(3x+46)>3 x 6 2)log4x-3x2>1 x3;
3)logx(x3-x2-2x)<3 x2; 4)
6 log x x
x
;
5)lg2x-lgx3+2
0 x 0;10 100; 6)1+log2(x-1)logx-14 x
5/4;2 3;
7) ) ( log x x
x=5 vµ x4 2;
8) 0 ) ( log 2 x x x
x=4 vµ x5; 9)
5 log log
2 5 x x x1;
10)logx2.log2x2.log24x>1 x2 2;0,5 1;2 2
11) 14 24 log 16
25
x x
x x 3;13;4
12) log log 2 x x
x x 4; 13)log2x64logx2163 x
1;4
2 ;
1 31
14)logx(4+2x)<1 x 2;1 1;00;12;
15)log (2 1)log (2 2)
2
2
x x
x 2log25;log23
16) log log 5(log4 3)
2
2x x x x 8;16
1 ;
17) log (3 8)
3
1 x
x
18 )
1
log3
x x
(6)19) log (3 2) log (3 2)
2
9 x x x x x
;1
3 1
;