Expression 20: "y" less than 30 Has graph. To audio trace, press ALT+T.y<30
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Expression 21: 0 less than or equal to "y" less than or equal to "g" left parenthesis, "x" , right parenthesis left brace, "x" less than "A" Subscript, 1 , Baseline , right brace Has graph. To audio trace, press ALT+T.0≤y≤gxx<A1
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Expression 22: "f" left parenthesis, "x" , right parenthesis less than or equal to "y" less than or equal to "g" left parenthesis, "x" , right parenthesis left brace, "A" Subscript, 1 , Baseline less than or equal to "x" , right brace Has graph. To audio trace, press ALT+T.fx≤y≤gxA1≤x
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Expression 23: "f" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.fx
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Expression 24: "g" left parenthesis, "x" , right parenthesis Has graph. To audio trace, press ALT+T.gx