三. 解下列不等式,并在数轴上表示出它们的解集. (1) 3x22x8 2. 32x94x (3). 2(2x3)5(x1) (4). 193(x7)0 2x2x1x53x2 (6) 12322(7) 5(x2)86(x1)7 (8)3[x2(x2)]x3(x2) 2x15x13x292x5x1(9) 1 (10) 32332(5) 11(x1)2x (12) 1[x1(x1)]2(x1) (11)23225(13) 3(x1)x10.4x0.90.030.02.xx5 (14) 23 0.50.03284三、解不等式组,并在数轴上表示它的解集 1. 2x10, 4x0. 2.3x0, 4x70.1x1x,42 2x43x3.2x53x, 6.x2x 32x41,82 x82(x2). 5.-5<6-2x<3. xx1,7.23 2(x3)3(x2)6. 9.2x1x543x. 25x32x10.3x1422x73x1, 11.x2 0.(2)5(1)12xx1,23x 12.3 13.11 44(x1)3x4.解下列方程: 3(y2)x1(1)2(x1)5y8xy (2)233x4y18 4x15y170(3)6x25y230xy13232 (4)xy3342 y1x221x23y243(5)4 (6) 32x3y12x13y2(7)542 3x153y240(9) x2y3 3x4y1812(7)1xy535 0.5x0.3y0.2 (9)2x13y2542 3x153y240xy11)231( 12x3y223x21y2413x2y2x3y(8)3x62y2x713 6y7510)x5y63x6y40 3x2y2x3)y3x62y2x71(863y75y1x(10)2 43y32x1(12)xy132x32 3y432( 本文来源:https://www.wddqw.com/doc/627b399d0e22590102020740be1e650e52eacf8b.html