(a) what is a sequence? a sequence is the sum of an unordered list of numbers. a sequence is the product of an ordered list of numbers. a sequence is an unordered list of numbers. a sequence is an ordered list of numbers. a sequence is the sum of an ordered list of numbers. (b) what does it mean to say that lim n → ∞ an = 8? the terms an approach -infinity as 8 approaches n. the terms an approach infinity as n become large. the terms an approach 8 as n becomes small. the terms an approach 8 as n becomes large. the terms an approach infinity as 8 approaches n. (c) what does it mean to say that lim n → ∞ an = ∞? the terms an become large as n becomes large. the terms an become small as n becomes large. the terms an become small as n becomes small. the terms an approach zero as n becomes large. the terms an become large as n becomes small.