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Algebra

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Finding Formula with 3 Terms

ALGEBR-4YLL1L

Find the formula for the arithmetic sequence with the first three terms equal to $7, 2, -3$.

A

$a_{n}=7+5(n-1)$

B

$a_{n}=7+5n$

C

$a_{n}=7-5n$

D

$a_{n}=7-5(n-1)$

E

none of the above