[r]
(1)Làm thêm tập nâng cao sau phương trình, bất phương trình mũ, lơgarit:
Giải phương trình mũ, lơgarit: 1)
3( 1)
1 12
2 6.2
2
x x
x- x
- - + =
2) (3- 5)x + +(3 5)x- 7.2x =0
3) (2+ 3)x + +(7 3).(2- 3)x =4.(2+ 3)
4) 1
5 x- - x- + 3- x +9.xx+ =0
5)
2 2
2logx+ =x log x- 48
6)
26
2
2 log log
x
x x
=
-7)
3x - (2x +9 3) x +9 x =0
8) x2- (3 2- x)x+2 2( - x)=0
9) 3 2 6 5 2 3 7
4x - x+ +4x +x+ =4 x + +x +1
10) 1 12
4x +x +2-x =2(x+) +1
11) x x+ log23=xlog27-
12) 32x +22x +2x =3x+1+2x+1+ +x 1
13)
3x =cos2x
14) 2
4x = -( 2x + +x 2) x
15)
3x =cos2x
16) 2 1
2cosx = +(2 x )x+
17) (2cos 2) 2cos
x
x x x+ x x
+ = +
18*) 9.7x + 1=
2x
20) 1 1 2
4x- - 2x - =(x- 1)
21) 3 4
2x +cosx - 2x + cosx =7.cos3x
22) 3 3 2
2x - x- 2x- ³ - x +4x-
23)
6
2log ( x + x) log= x
24) log (3 )