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5.3: Let's Define Some Sequences Use the first 5 terms of each sequence to state if the sequence is arithmetic, geometric, or neither. Next, define the sequence recursively using function notation. 1. A: 30, 40, 50, 60, 70,... 2. B: 80, 40, 20, 10,5, 2.5,... 3. C21, 2, 4, 8, 16, 32,... 4.D:1,4,4,4,4,... 5. : 20, 13, 6,-1,-8,... 6. 1,3, 7, 15, 31