수식 6: "m" equals StartFraction, left parenthesis, "f" left parenthesis, "a" plus "h" , right parenthesis minus "f" left parenthesis, "a" , right parenthesis , right parenthesis Over "h" , EndFractionm=fa+h−fah
equals=
negative 2−2
6
Equation of secant line
7
수식 8: "y" equals "m" left parenthesis, "x" minus "a" , right parenthesis plus "f" left parenthesis, "a" , right parenthesisy=mx−a+fa
8
Equation of tangent line
9
수식 10: "y" equals "f" prime left parenthesis, "a" , right parenthesis left parenthesis, "x" minus "a" , right parenthesis plus "f" left parenthesis, "a" , right parenthesisy=f′ax−a+fa
