運算式 4: "f" left parenthesis, "x" , right parenthesis equals cosine left parenthesis, "x" Superscript, 2 thirds , Baseline , right parenthesisfx=cosx23
4
運算式 5: "f" prime left parenthesis, "x" , right parenthesisf′x
5
運算式 6: "e" Superscript, negative StartFraction, 1 Over "x" , EndFraction , Baseline left brace, "x" greater than 0 , right bracee−1xx>0
6
運算式 7: "y" equals 0 left brace, "x" less than or equal to 0 , right bracey=0x≤0
