# Next element in arithmetic sequence

Problem to find next arithmetic sequence in given sequence.

## Example-1:

Input : n = [ 1, 3, 5, 7] Output : 9

## Example-2:

Input : n = [ 10, 8, 6] Output : 4

# Solution

n = [ 1, 3, 5, 7] a = n[-1] + (n[-1]-n[-2]) print(a)

## Output

9