Expression 8: "y" equals "f" prime left parenthesis, "x" , right parenthesis left brace, "y" less than 0 , right bracey=f′xy<0
8
Expression 9: "y" equals "f" prime left parenthesis, "x" , right parenthesis left brace, "y" greater than 0 , right bracey=f′xy>0
9
Expression 10:
10
Expression 11:
11
Expression 12:
12
Expression 13: "f" prime prime prime left parenthesis, "x" , right parenthesisf′′′x
13
Expression 14: "y" equals negative StartFraction, 8 left parenthesis, "x" plus 5 , right parenthesis Over 27 "x" Superscript, 8 thirds , Baseline , EndFractiony=−8x+527x83
14
Expression 15: "f" prime prime prime left parenthesis, 0 , right parenthesisf′′′0