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1、 1 初二数学不等式 解下列不等式:(1)x175;(2)x213;(3)x327 11;(4)351x354x (5)3x14;(6)3x1;(7)2(x1)3x;(8)3(x2)5(x2);(5)21x312 x;(6)532 x413 x (7)22x1 x-1 (8)2x-13(x-1)(9)3x-2x5 (10)x-62x 2(11)2x3x1 (12)2x7 5 2x (13)231x1 2x (14)x21(4x1)2 (15)103(x6)1;(16)21(x3)12x;(17)x422x;(18)312 x424x.(19)21x1 4x (20)0.01x1 0.02x (
2、21)312 x215 x1 (22)34x 3 1 32x (23)5x1 3(x+1)(24)421x1031x51 3(25)757 x2 2(x+1)(26)x+2x+3x11 (27)312 x25x (28)2x31x 1 (29)2(3+x)3(x+2)(30)321x634x (31)212 x2x (32)25x+1x 3 (33)31x 2 1 51x (34)5x+15x1 (35)2x+23x1 (36)312 x62x21x1 4 初二数学不等式组 解下列不等式组:(1);112,22xx (2);31,123xx (3);03,012xx (4).514,02xx
3、(5);131,195xx (6).122,32xxx (7);421211,1582xxxx (8);31052,932xxxx 5(9);215123),12(334xxxx (10);1312),2(34xxxx (11)312 x215 x1 (12)2x-73(x1)5x-13(x+1)34x+31 32x (13)5x-23(x+1)(14)3x-2x+1 21x -1 7 23x x+54x+1 (15)x+35 (16)2x+12(x1)3x-18 3x52x (17)x-12x (18)2x+53(x+2)2x+33 21x3x 6(19)0.2x0.3x+1 (20)x-2
4、141 0.5x-10.2 3x+2x1 (21)1+2x3+x (22)2x 1 5x4x1 3 x 1 (23)3(x1)4x2 (24)21+32x 2x+35 5x21x 3(x1)x 5 (25)21(x+3)2 (26)x3(x2)4 22x33x 321xx 1 (27)5 2x+16 (28)1 1 51x 53 7 (29)54x 1 (30)5x+13(x+1)212 x2x+25 21x312 x (31).13112,123xxx (32);4323,533xx (33);232,212xxx (34)021,042xx (35)424,532xx (36);62,513xx 8(37)7859321234xxxx (38)8)2(3314xxxx (39)4)2(325312xxxx (40)xxxx3238)1(31 (41)012)1(31xxx (42)038321xxx (43)01232xxx (44)4)2(3121xxx