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Write a recursive formula for 16, 9, 7, 2, 5

User Sonoman
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1 Answer

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Notice that:

7=16-9
2=9-7
5=7-2

the next term would be: 2-5=-3

so each term of the sequence is equal to its previous term, subtracted from the second previous term:

Also, in order to describe the formula, we need to express the 2 first terms, 1 is not enough.

The recursive formula is:


a_1=16

a_2=9

a_n_2=a_n_1-a_n
User Max Woolf
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