運算式 18: "r" left parenthesis, "p" , "d" , "t" , right parenthesis equals "p" plus left parenthesis, "d" negative "p" , right parenthesis times "t"rp,d,t=p+d−p·t
18
運算式 19: left parenthesis, "r" left parenthesis, "c" Subscript, "x" , Baseline , "d" Subscript, "x" , Baseline , "t" , right parenthesis , "r" left parenthesis, "c" Subscript, "y" , Baseline , "d" Subscript, "y" , Baseline , "t" , right parenthesis , right parenthesisrcx,dx,t,rcy,dy,t
定義域 t 最小值： 00
less than or equal to "t" less than or equal to≤t≤
定義域 t 最大值： 11
19
運算式 20: left parenthesis, "r" left parenthesis, "a" Subscript, "x" , Baseline , "b" Subscript, "x" , Baseline , "t" , right parenthesis , "r" left parenthesis, "a" Subscript, "y" , Baseline , "b" Subscript, "y" , Baseline , "t" , right parenthesis , right parenthesisrax,bx,t,ray,by,t
定義域 t 最小值： 00
less than or equal to "t" less than or equal to≤t≤
