Expression 3: "u" equals left parenthesis, StartFraction, "n" Over 1 minus "n" , EndFraction , right parenthesis to the 20th power equals 8.1 7 9 0 6 9 3 7 6 times 10 to the 39th poweru=n1−n20
equals=
8.1 7 9 0 6 9 3 7 6 times 10 to the 39th power8.179069376×1039