表达式4: "i" Subscript, "d" "x" "L" , Baseline left parenthesis, "f" left parenthesis, "t" , right parenthesis , "a" , right parenthesisidxLft,a
定义域t最小值： negative 10−10
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 1010
4
表达式5: "a" equals 2.7 9 8a=2.798
00
length left parenthesis, "f" left parenthesis, "x" , right parenthesis , right parenthesislengthfx
5
表达式6: "f" left parenthesis, "x" , right parenthesis equals left bracket, left parenthesis, cos .1 left parenthesis, "x" plus 10 , right parenthesis pi , sin .1 "x" pi , right parenthesis , left parenthesis, cos .0 5 left parenthesis, "x" plus 10 , right parenthesis pi , negative sin .0 5 left parenthesis, "x" plus 10 , right parenthesis pi , right parenthesis , left parenthesis, negative "x" , sin "x" , right parenthesis , right bracketfx=cos.1x+10π,sin.1xπ,cos.05x+10π,−sin.05x+10π,−x,sinx
6
表达式7: "L" Subscript, "l" "e" "r" "p" , Baseline left parenthesis, "x" , "y" , right parenthesis equals Start sum from "k" equals 1 to length left parenthesis, "x" . "x" , right parenthesis , end sum, "x" . "y" left bracket, "k" , right bracket left parenthesis, Start product from "n" equals 1 to "k" minus 1, end product, StartFraction, "y" minus "x" . "x" left bracket, "n" , right bracket Over "x" . "x" left bracket, "k" , right bracket minus "x" . "x" left bracket, "n" , right bracket , EndFraction , right parenthesis left parenthesis, Start product from "n" equals "k" plus 1 to length left parenthesis, "x" . "x" , right parenthesis , end product, StartFraction, "y" minus "x" . "x" left bracket, "n" , right bracket Over "x" . "x" left bracket, "k" , right bracket minus "x" . "x" left bracket, "n" , right bracket , EndFraction , right parenthesisLlerpx,y=lengthx.x∑k=1x.ykk−1∏n=1y−x.xnx.xk−x.xnlengthx.x∏n=k+1y−x.xnx.xk−x.xn
