Answer to Question #17144 in Abstract Algebra for Anna Goldman

Question #17144

Are the following sequences arithmetic? If so, what is the common difference and the explicit formula?
7) 183, 1835, 18355, 183555

8) -1, 1, 4, 8

9) -35, -42, -49, -56

10) 9, 0, -9, -18

11) 9, 17, 25, 33

12) 2, 5, 10, 17

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