表达式4: "a" Subscript, 1 , Baseline equals negative StartFraction, 2 left parenthesis, 4 "e" minus 1 , right parenthesis Over left parenthesis, "e" minus 1 , right parenthesis squared "e" left parenthesis, 1 plus "e" , right parenthesis , EndFractiona1=−24e−1e−12e1+e
4
表达式5: "a" Subscript, "n" 1 , Baseline equals StartFraction, 2 left parenthesis, "e" minus 4 , right parenthesis "e" cubed Over left parenthesis, "e" minus 1 , right parenthesis squared left parenthesis, 1 plus "e" , right parenthesis , EndFractionan1=2e−4e3e−121+e
5
表达式6: left parenthesis, 1 , 9 , right parenthesis1,9
6
表达式7: left parenthesis, 2 , 7 , right parenthesis2,7
7
表达式8: left parenthesis, 3 , negative 1 , right parenthesis3,−1
