Determine whether each sequence is arithmetic, geometric, or neither. a. a(1) = 7, a(n) = a(n − 1) – 3 for n > 2.
b. b(1) = 2,b(n) = 2 · b(n– 1) - 1 for n 2 2.
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C. c(1) = 3,c(n) = 10 •c(n-1) for n 2 2.
d. d(1) = 1,d(n) = n. d(n-1)
·d(n − 1) for n > 2.