Given the geometric sequence: 13, 7811, 468121, ⋯\displaystyle {13},\ \frac{{78}}{{11}},\ \frac{{468}}{{121}},\ \cdots13, 1178, 121468, ⋯ Find an explicit formula for an\displaystyle {a}_{{n}}an, where the first term is a1=13\displaystyle {a}_{{1}}={13}a1=13. an=\displaystyle {a}_{{n}}=an= Preview Question 1 Part 1 of 2 Find a7=\displaystyle {a}_{{{7}}}=a7= Preview Question 1 Part 2 of 2
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