Write out a general term formula of the sequence, so that the first five terms are: 11, 12, 13, 14, 15

Write out a general term formula of the sequence, so that the first five terms are: 11, 12, 13, 14, 15

an=10+n

Write the general formula of 1, - 1,1, - 1

(n + 1) power of (- 1)

3, - 3,3, - 3, - 3,3 general term formula
Don't tell me it's the N + 1 power of - 1 times 3. Look at the fifth term, which is - 3

{a (n) = 3 * (- 1) ^ (n-1) when n

What is the general term formula of sequence 1,2 / 3,1 / 2,2 / 5,1 / 3

1,2/3,1/2,2/5,1/3
It can be adjusted to 2 / 2, 2 / 3, 2 / 4, 2 / 5, 2 / 6
The rule is: 2 * (1 / (n + 1)), n = 1,2,3
It is reduced to: 2 / (n + 1), n = 1,2,3