Is 1 - 8 4 100 - 9 a sequence and why

Is 1 - 8 4 100 - 9 a sequence and why

yes
The definition of sequence is: a sequence of numbers arranged in a certain order is called sequence
This is a column of numbers, and there is a certain order
So it's a sequence

1、-8、4、100、-9

Yes
He is a column of numbers in a certain order
So it's a sequence

Given the sum of the first n terms of the sequence {an}, Sn = n & # 178; + N, sum 1 / A1A2 + 1 / a2a3 +. + 1 / an-1 * an + 1 / an * an + 1
What is the sum of 3 - (9-3 to the power of N + 1) - (2n-1) * 3

It can be obtained by using an = SN-S (n-1), and then by using the split term elimination method