Converting Recursive and Explicit Forms of Arithmetic Sequences: Challenge Problem

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This video continues with the idea of converting between explicit and recursive formulas for arithmetic sequences by looking at a more challenging example from the Khan Academy exercise linked below.

It is usually helpful to have the general formulas for both recursive and explicit forms, but it is also possible to write out the sequence using the given formula and construct the other formula from the sequence.

Khan Academy exercise to practice:

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