Question

PLEASE HELP WILL MEDAL!

Which of the following are series?

Answer 1

A,C,D,E

Answer 2

You sure?

Answer 3

B is a product, and a series must be a sum of numbers.

C and E are series (anything with a sigma notation should be a series), as it is a sum

D is a series of adding negative numbers: -1 + (-2) + (-3) + ...

A: is a sum but there is no "pattern" because of the last term. Nevertheless, a series is a sum of a sequence and there need not be a formula associated with the sequence. It can be a bunch of random numbers. Although a sequence has an order, once you sum the term s, you can re-order the terms in the sum by he commutative property of addition

Answer 4

cool thank you