Expression 9: "y" minus "f" left parenthesis, "a" , right parenthesis equals StartFraction, "f" left parenthesis, "a" , right parenthesis minus "f" left parenthesis, "a" minus "h" , right parenthesis Over "h" , EndFraction left parenthesis, "x" minus "a" , right parenthesisy−fa=fa−fa−hhx−a
9
Expression 10: "y" minus "f" left parenthesis, "a" , right parenthesis equals "g" left parenthesis, "a" , right parenthesis left parenthesis, "x" minus "a" , right parenthesis left brace, "h" equals 0 , right bracey−fa=gax−ah=0
10
Hidden Label: left parenthesis, "a" , "f" left parenthesis, "a" , right parenthesis , right parenthesisa,fa
Label
11
Expression 12: "g" left parenthesis, "x" , right parenthesis equals StartFraction, "d" Over "d" "x" , EndFraction left parenthesis, "f" left parenthesis, "x" , right parenthesis , right parenthesisgx=ddxfx
12
Hidden Label: left parenthesis, "a" minus "h" , "f" left parenthesis, "a" minus "h" , right parenthesis , right parenthesisa−h,fa−h
Label
13
Secant Line Q: "Q" equals left parenthesis, "a" minus "h" , "f" left parenthesis, "a" minus "h" , right parenthesis , right parenthesisQ=a−h,fa−h
Label:
14
P Tangent line: "P" equals left parenthesis, "a" , "f" left parenthesis, "a" , right parenthesis , right parenthesisP=a,fa
Label:
15
Expression 16: "f" left parenthesis, "a" plus "h" , right parenthesisfa+h