SOLUTION: Determine the pattern in each group: 3,-6,12,4,20,? 7,16,8,27,9,? 2,7,26,101,400,? 7,21,8,72,9,?

Question 909615: Determine the pattern in each group:
3,-6,12,4,20,?
7,16,8,27,9,?
2,7,26,101,400,?
7,21,8,72,9,?
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
In the future, please post problems individually.
The sequences are already answered here.
You can often find your questions (if they are standard) by searching a search engine with the site:algebra.com tag. For instance, http://duckduckgo.com, search "3,-6,12,4,20,? site:algebra.com" to find the link above.
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