Expression 6: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dffffx,y≤2
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Expression 7: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dfffffx,y≤2
7
Expression 8: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dffffffx,y≤2
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Expression 9: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dfffffffx,y≤2
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9
Expression 10: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dffffffffx,y≤2
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10
Expression 11: "D" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, "f" left parenthesis, left parenthesis, "x" , "y" , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis , right parenthesis less than or equal to 2 Has graph.Dffffffffffx,y≤2