表达式27: "p" left parenthesis, "a" , "c" , right parenthesis equals Start product from "n" equals "a" plus 1 to "a" plus "N" minus 1, end product, left parenthesis, StartFraction, "c" minus "X" left bracket, mod left parenthesis, "n" minus 1 , "N" , right parenthesis plus 1 , right bracket Over "X" left bracket, "a" , right bracket minus "X" left bracket, mod left parenthesis, "n" minus 1 , "N" , right parenthesis plus 1 , right bracket , EndFraction , right parenthesispa,c=a+N−1∏n=a+1c−Xmodn−1,N+1Xa−Xmodn−1,N+1
27
表达式28: "f" left parenthesis, "x" , right parenthesis equals Start sum from "i" equals 1 to "N" , end sum, left parenthesis, "p" left parenthesis, "i" , "x" , right parenthesis times "Y" left bracket, "i" , right bracket , right parenthesisfx=N∑i=1pi,x·Yi
28
表达式29: "y" equals "a" Subscript, 0 , Baseline plus "a" Subscript, 1 , Baseline "x" plus "a" Subscript, 2 , Baseline "x" squared plus "a" Subscript, 3 , Baseline "x" cubed plus "a" Subscript, 4 , Baseline "x" to the 4th power plus "a" Subscript, 5 , Baseline "x" to the 5th power plus "a" Subscript, 6 , Baseline "x" to the 6th powery=a0+a1x+a2x2+a3x3+a4x4+a5x5+a6x6
