Phan Thảo Nguyên-C3-TH.[r]
(1)Phan Thảo Nguyên-C3-TH
BÀI TẬP VỀ PHƯƠNG TRÌNH MŨ Bài1: Giải phương trình sau:
1 9x1 272x2
2 32 2
x
x
3 2 2 448
x x
x
4 3 1.2 8.4 2
x
x x
5 2 .5 0,2.(10 1)5
x
x x
6 (2 3)2 3
x
7
4 2x23x2
8 2.3x1 6.3x1 3x 9
9 2x1.5x 200
10 0,125.42x (4 2)x
11.3 18.3 29
x
x
12 27x 12x 2.8x
13 4x 3x
4
3
14 3 .8x1 36
x x
15 6.5log 55
x
x
16 6x6x1 2x2x12x2
17 x x x
1 1
18 2sin2x 4.2cos2x 6
19
1 cos cos
3 7.4 4
4 x x
20
17 128 25 32 x x x x
21 4x 3x0,5 3x0,5 22x1
22 5x1 10x.2x.5x1
23 34 4.32 28 2log2
x
x
Bài 2: Giải phương trình sau: 1.3 23x 32
2 5x16.5x 3.5x152
3 3x13x2 3x39.5x 5x15x2
4 3x.2x1 72.
5 x
x 125 25
6 x x
( 2) )
5 ,
(
7 6.2
x
x
8 31x 31x 10
9 3.25x 2.49x 5.35x 10 32x445.6x 9.22x2 0
11 8x 8.(0,5)3x 3.2x 125 24.(0,5)x
12 6 35 6 35 12 x x
13 7x 5x
7
5
14 5 .8 x1 500 x
x
15 53log5x 25x
16 x6.3logx3 35
17 9xlog9x x2
18 x4.53 5logx5
19 2 24 3 2
x
x
20 4log0,5(sin2x5sinx.cosx2) 91 21* 3x 5 2x
22*
5
x x x
23* x x x
10
6
24* 52 6 x 5 2 6x 10x 25*. 2 3 x 2 3x 2x
26*
6 2
3
x x x x x x
27.32 1(3 7)
x x x
x
28 255 2.55 ( 2)
x x x x
29* xlog29 x2.3log2x xlog23
30* 3 4 52
x x
31 2cos2x 4.2sin2x 6
32
0
15
3 2sin 2cos
8 log sin cos cos sin 15
x x
x x x
x
Bài 3: Giải phương trình sau: 1.5 3 21 25 21 3 22
x x x
x ĐS:
3 ;
3
x x 15 10 10 125 , 16 x x x x
3.3x1182x.22x.3x1
4
17 2187 243 x x x x
5 2x1 3x 3x1 2x2
6 73x 9.52x 52x 9.73x x x x x
1 1
8 2
1 3 2
9
x x x
x
9
(2)Phan Thảo Nguyên-C3-TH
10 2 .3 1 ( 3) 2
x
x x
11 2 24 .9 12
3
,
0
x
x x
x
12 x
x x
x
x
1
3 2) ( 4) 2
( )
(
13 .9
2
3 x x x x
14 2 2 1 2 2 3 3 2 3 1
x x x x x
x
15 3
x
x x
x
16 4
x x
x
17 (x4)x25x6 1 18 x3 2x ( x)x
19 x x
x x
1
2 1
2
2
20.( 2 2) 2 2
x x x
x x
21 ( 1) 2
x x x
x x
Bài4: Giải phương trình sau: 32x26x9 4.15x23x5 3.52x26x9
2
x
x
3.4 17
x
x
4 51 51 24
x x
5 53 20
x
x
6 x x x x
3.2
4
7 x x x
1 1
25 35
49
8 125 50 23 1
x x
x
9 2.49x2 9.14x2 7.4x2 0
10 25 3.101 21 0
1
x x x
11 2 5.2 2
x x x
x
12 4x x25 12.2x1 x25 80 13 3.2 8.2 4 0
1
1
x
x x
14 82 23x3 200 x
x
15.32x4 45.6x 9.22x2 0
16 22x.9x 2.63x1 42x1.34x2 0
17 8x 18x 2.27x
18 12
6
1
3
x x
19 x x x
1 1
9
2
20 4 92 7
x x
21 22 3.2 32
x
x
22 53 9.5 27(5 ) 64
x x x
x
23 23x 6.2x 23(1x) 12.2x 1
24 2 3 2 3 4 x x
25 (4 15)x (4 15)x 62
26 (2 3)x (74 3)(2 3)x 4(2 3)
27 (74 3)x 3(2 3)x 2
28 (3 5)x (3 5)x 7.2x
29 3(1 5) ( 5 1) 2 1
x x x
30 74 3cos 7 3sin 4 x x
31 2
) (
)
( xx 1xx xx
(3)