$\"\"$

The given sequence is $\"\"$

In the above sequence the difference between consecutive terms is constant.

So, the sequence is an arithmetic sequence. $\"\"$

$\"\"$

The common difference is $\"\"$ .

The next three terms in the sequence are $\"\"$ $\"\"$ $\"\"$ is an arithmetic sequence having the common difference $\"\"$ .

Next three terms are $\"\"$ .