นิพจน์ 16: "y" less than "l" left parenthesis, "x" , right parenthesis left brace, "r" Subscript, "x" , Baseline greater than or equal to "x" greater than 0 , right brace left brace, "y" greater than 0 , right bracey<lxrx≥x>0y>0
16
นิพจน์ 17: "y" less than "f" left parenthesis, "x" , right parenthesis left brace, "x" greater than "r" Subscript, "x" , Baseline , right brace left brace, "y" greater than 0 , right bracey<fxx>rxy>0
17
นิพจน์ 18: "A" Subscript, "p" "i" "e" , Baseline equals Start integral from 0 to "a" Subscript, "x" , Baseline , end integral, "f" left parenthesis, "x" , right parenthesis "d" "x"Apie=∫ax0fxdx
equals=
0.7 8 5 3 9 8 1 6 3 3 9 70.785398163397
18
นิพจน์ 19: "A" Subscript, "g" "r" "e" "e" "n" , Baseline equals Start integral from 0 to "r" Subscript, "x" , Baseline , end integral, "l" left parenthesis, "x" , right parenthesis "d" "x" positive Start integral from "r" Subscript, "x" , Baseline to "a" Subscript, "x" , Baseline , end integral, "f" left parenthesis, "x" , right parenthesis "d" "x"Agreen=∫rx0lxdx+∫axrxfxdx
equals=
0.3 9 2 6 9 9 0 8 1 6 9 90.392699081699
19
นิพจน์ 20: "A" Subscript, "r" "e" "s" "t" , Baseline equals "A" Subscript, "p" "i" "e" , Baseline minus "A" Subscript, "g" "r" "e" "e" "n" , BaselineArest=Apie−Agreen
equals=
0.3 9 2 6 9 9 0 8 1 6 9 90.392699081699
20
นิพจน์ 21:
21
22
ดำเนินการโดย
ดำเนินการโดย
left parenthesis, "a" Subscript, "x" , Baseline , 0 , right parenthesisax,0
left parenthesis, 0 , "a" Subscript, "y" , Baseline , right parenthesis0,ay
left parenthesis, "r" Subscript, "x" , Baseline , "r" Subscript, "y" , Baseline , right parenthesisrx,ry
