表达式7: "B" Subscript, "x" , Baseline left parenthesis, "t" , right parenthesis equals "P" Subscript, 0 , Baseline . "x" plus "t" left parenthesis, negative 3 "P" Subscript, 0 , Baseline . "x" plus 3 "P" Subscript, 1 , Baseline . "x" , right parenthesis plus "t" squared left parenthesis, 3 "P" Subscript, 0 , Baseline . "x" minus 6 "P" Subscript, 1 , Baseline . "x" plus 3 "P" Subscript, 2 , Baseline . "x" , right parenthesis plus "t" cubed left parenthesis, negative "P" Subscript, 0 , Baseline . "x" plus 3 "P" Subscript, 1 , Baseline . "x" minus 3 "P" Subscript, 2 , Baseline . "x" plus "P" Subscript, 3 , Baseline . "x" , right parenthesisBxt=P0.x+t−3P0.x+3P1.x+t23P0.x−6P1.x+3P2.x+t3−P0.x+3P1.x−3P2.x+P3.x
7
表达式8: "B" Subscript, "y" , Baseline left parenthesis, "t" , right parenthesis equals "P" Subscript, 0 , Baseline . "y" plus "t" left parenthesis, negative 3 "P" Subscript, 0 , Baseline . "y" plus 3 "P" Subscript, 1 , Baseline . "y" , right parenthesis plus "t" squared left parenthesis, 3 "P" Subscript, 0 , Baseline . "y" minus 6 "P" Subscript, 1 , Baseline . "y" plus 3 "P" Subscript, 2 , Baseline . "y" , right parenthesis plus "t" cubed left parenthesis, negative "P" Subscript, 0 , Baseline . "y" plus 3 "P" Subscript, 1 , Baseline . "y" minus 3 "P" Subscript, 2 , Baseline . "y" plus "P" Subscript, 3 , Baseline . "y" , right parenthesisByt=P0.y+t−3P0.y+3P1.y+t23P0.y−6P1.y+3P2.y+t3−P0.y+3P1.y−3P2.y+P3.y
8
connections
对学生隐藏该文件夹。
9
connections 2
对学生隐藏该文件夹。
13
connections 3
对学生隐藏该文件夹。
18
表达式20: left parenthesis, "B" Subscript, "x" , Baseline left parenthesis, "t" , right parenthesis , "B" Subscript, "y" , Baseline left parenthesis, "t" , right parenthesis , right parenthesisBxt,Byt
定义域t最小值： 00
less than or equal to "t" less than or equal to≤t≤
