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To find the equation of a sequence, you first have to look at the differences between the numbers. In this case the differences are 4, and 4. Thus the equation begins 4n.

The sequence minus 4n is:

3, 3, 3

Thus the equation in its entirety is that the value of the term in position n is 4n+3

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Q: What is the position to term rule in this sequence 7 11 15?
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