Expression 4: "f" prime left parenthesis, "a" , right parenthesisf′a
equals=
3.2 83.28
4
Expression 5: "y" minus "f" left parenthesis, "a" , right parenthesis equals "f" prime left parenthesis, "a" , right parenthesis left parenthesis, "x" minus "a" , right parenthesisy−fa=f′ax−a