表达式21: "y" less than negative 2.5 7 "x" plus 4.1 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, negative 1 less than "x" less than 0 , right bracey<−2.57x+4.1y>0x2+y2>42−1<x<0
21
表达式22: "x" squared plus "y" Superscript, 2 , Baseline equals 4 squared left brace, "y" less than or equal to 6 , right bracex2+y2=42y≤6
22
表达式23: "y" less than 2.5 "x" plus 4.2 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 0 less than "x" less than 1 , right bracey<2.5x+4.2y>0x2+y2>420<x<1
23
表达式24: "y" less than negative 2.4 "x" plus 9.1 4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 1 less than "x" less than 4 , right bracey<−2.4x+9.14y>0x2+y2>421<x<4
24
表达式25: "y" less than 2.5 "x" minus 2.4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 2.4 less than "x" less than 3.6 , right bracey<2.5x−2.4y>0x2+y2>422.4<x<3.6
25
表达式26: "x" equals negative 3.9 left brace, 0.9 less than "y" less than 7.6 8 , right bracex=−3.90.9<y<7.68
26
表达式27: "y" equals 3 "x" plus 11 left brace, 4 less than "y" less than 8 , right bracey=3x+114<y<8
27
表达式28: "y" equals negative 3 "x" plus 5 left brace, 5 less than "y" less than 8 , right bracey=−3x+55<y<8
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表达式29: "y" equals 3 "x" plus 5 left brace, 5 less than "y" less than 8 , right bracey=3x+55<y<8
29
表达式30: "y" equals negative 2.3 7 "x" plus 10.3 left brace, 4.4 less than "y" less than 8 , right bracey=−2.37x+10.34.4<y<8
30
表达式31: "y" equals 2.3 8 "x" minus 1.5 left brace, 4.4 less than "y" less than 7.6 , right bracey=2.38x−1.54.4<y<7.6
31
表达式32: "x" equals 3.8 left brace, 1.2 4 9 less than "y" less than 7.6 , right bracex=3.81.249<y<7.6
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表达式33: "x" squared plus "y" Superscript, 2 , Baseline equals 4 squared left brace, "y" less than or equal to 6 , right bracex2+y2=42y≤6
33
表达式34: "y" equals negative 2.3 8 "x" minus 1.5 left brace, 4.4 less than "y" less than 7.6 8 , right bracey=−2.38x−1.54.4<y<7.68
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表达式35: "y" equals negative 2.3 8 "x" minus 1.5 left brace, 4 less than "y" less than 7.6 8 , right bracey=−2.38x−1.54<y<7.68
35
表达式36: "y" less than negative 2.5 "x" minus 2.4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, negative 3.6 less than "x" less than negative 2.3 , right bracey<−2.5x−2.4y>0x2+y2>42−3.6<x<−2.3
36
表达式37: "y" less than negative 2.5 "x" minus 2.4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, negative 3.6 less than "x" less than negative 2.3 , right bracey<−2.5x−2.4y>0x2+y2>42−3.6<x<−2.3
37
表达式38: "y" less than 2.5 "x" minus 2.4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 2.4 less than "x" less than 3.6 , right bracey<2.5x−2.4y>0x2+y2>422.4<x<3.6
38
表达式39: "y" less than negative 2.4 "x" plus 9.1 4 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 1 less than "x" less than 4 , right bracey<−2.4x+9.14y>0x2+y2>421<x<4
39
表达式40: "y" less than 2.5 "x" plus 4.2 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, 0 less than "x" less than 1 , right bracey<2.5x+4.2y>0x2+y2>420<x<1
40
表达式41: "y" less than 2.5 "x" plus 9.1 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, negative 2.3 less than "x" less than negative 1 , right bracey<2.5x+9.1y>0x2+y2>42−2.3<x<−1
41
表达式42: "y" less than negative 2.5 7 "x" plus 4.1 left brace, "y" greater than 0 , right brace left brace, "x" squared plus "y" squared greater than 4 squared , right brace left brace, negative 1 less than "x" less than 0 , right bracey<−2.57x+4.1y>0x2+y2>42−1<x<0
