Expression 2: 0 less than or equal to "x" less than or equal to StartFraction, "y" to the 4th power minus 2 Over 2 "y" squared , EndFraction left brace, StartRoot, "a" plus StartRoot, "a" squared plus 2 , EndRoot , EndRoot greater than "y" greater than 0 , right brace Has graph. To audio trace, press ALT+T.0≤x≤y4−22y2a+a2+2>y>0
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Expression 3: "a" equals 3.8a=3.8
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1010
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Expression 4: StartFraction, "d" Over "d" "x" , EndFraction left parenthesis, left parenthesis, "x" StartRoot, "x" plus StartRoot, "x" squared plus 2 , EndRoot , EndRoot , right parenthesis minus StartFraction, left parenthesis, "x" plus StartRoot, "x" squared plus 2 , EndRoot , right parenthesis squared plus 6 Over 6 StartRoot, "x" plus StartRoot, "x" squared plus 2 , EndRoot , EndRoot , EndFraction , right parenthesis Has graph. To audio trace, press ALT+T.ddxxx+x2+2−x+x2+22+66x+x2+2