Expression 5: "g" left parenthesis, "x" , right parenthesis equals StartFraction, "h" Superscript, left parenthesis, "q" minus 1 , right parenthesis , Baseline Over left parenthesis, StartNestedFraction, left parenthesis, 1 minus "h" Superscript, left parenthesis, "x" minus 1 , right parenthesis , Baseline , right parenthesis NestedOver left parenthesis, 1 minus "h" , right parenthesis , EndNestedFraction , right parenthesis , EndFraction left brace, 1 less than or equal to "q" less than or equal to left parenthesis, "x" minus 1 , right parenthesis , right bracegx=hq−11−hx−11−h1≤q≤x−1
5
Expression 6: "f" left parenthesis, "x" , right parenthesis "g" left parenthesis, "x" , right parenthesisfxgx