Question

Describe the patter and find the next two terms of each sequence
5,1,7,0,9,-1,11

Answer 1

There are two interleaved arithmetic sequences here.

Odd terms are 5, 7, 9, 11, increasing by 2 each time.

Even terms are 1, 0, -1, decreasing by 1 each time.

The next two terms will be -2, 13.