一、解下列不等式,并在数轴上表示出它们的解集. 1. 3x22x8 2. 32x94x
3. 2x-19<7x+31.
:
5.x+8≥4x-1; )
7. 193(x7)0
9 10-4(x-3)≤2(x-1) 10.
4.-2x+1>0; 6. 2(2x3)5(x1) <2(4x+3); 3(y2)182(y1) 8. 3(2x+5) 11.2(x-4)-3<1-3(x-2) 12.
、
mm11 32
13. 15.
(
2x2x1x53x2 14. 123223x42x1 16. 63x1≤5x3 17
x1x4(x-1)≥1; 18 2 323
19 2(3x1)3(4x5)x4(x7) 20
x5x77x2; 1234
~
二 、解下列关于x的不等式组
12x3x , 23x14, 1. 5x4x12xx2.
x512x,2x1x,3. 4
3x24x.x24x1.
#
3(x1)5x4 ①5.x12x2≤13
2x5173x, 8.x1314x8.
,
2x53(x2)9.x12x3
② 3x15(x1)43x665x 3x3x24,12x3x1. 1(x2)2x.31x112x23. 6
10
≤32x3x1≤1. 12.-1<≤4 5
13 12x3x5x4x1 14 .
x512x,153x24x. 16
&
17 182x30 3 x 2 0
23x14,2xx2. 2x1x,x24x1.
2x3x182x
2x51x,319 20 x13x1.48
x3x24,12xx1.32x53(x2)1(x2)2x13x21x1 22
23,
23 0≤
32x5≤1 24
3(x1)5x25 4 ①x12x12≤3 ②!
27 283x12(x1) 2(x1)4x
x1212x3.-1<3x12≤4
3x15(x1)43x665x3 3(x2)45xx12x3x1 26
3x12x12x13 29 30
2x82x33x
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