Expression 17: "a" Subscript, "s" , Baseline equals StartFraction, "f" left parenthesis, "x" Subscript, 0 , Baseline plus "h" , right parenthesis minus "f" left parenthesis, "x" Subscript, 0 , Baseline , right parenthesis Over "h" , EndFraction equals 3as=fx0+h−fx0h
equals=
33
17
Expression 18: "b" Subscript, "s" , Baseline equals "y" Subscript, 0 , Baseline minus "a" Subscript, "s" , Baseline "x" Subscript, 0 , Baseline equals negative 2bs=y0−asx0
equals=
negative 2−2
18
Expression 19: "y" equals "a" Subscript, "s" , Baseline "x" plus "b" Subscript, "s" , Baseline Has graph. To audio trace, press ALT+T.y=asx+bs
19
Sekantens hældning går mod:
20
Expression 21: "x" Superscript, 0 , Baseline "x" Subscript, 0 , Baseline undefined times left parenthesis, ln left parenthesis, "x" Subscript, 0 , Baseline , right parenthesis plus 1 , right parenthesis equals 1xx00·lnx0+1