表达式4: "y" equals negative "m" "x" plus "b" left brace, left parenthesis, "x" , right parenthesis squared plus left parenthesis, "y" , right parenthesis squared less than or equal to 4 , right bracey=−mx+bx2+y2≤4
4
表达式5: "b" equals 0b=0
negative 10−10
1010
5
表达式6: "m" equals 0m=0
"S" Subscript, "t" "a" "r" "t" , BaselineStart
"S" Subscript, "t" "a" "r" "t" , BaselineStart
6
表达式7: left parenthesis, "x" , right parenthesis squared plus left parenthesis, "y" , right parenthesis squared less than or equal to 4x2+y2≤4
