Respuesta :

The common difference of this arithmetic sequence is 13. This means that each term is 13 more than the previous term.

Here's the explanation:

- The second term (42) is 13 more than the first term (29).
- The third term (55) is 13 more than the second term (42).
- The fourth term (68) is 13 more than the third term (55).

So, the common difference is 13.
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