6-1 Arithmetic and Geometric Sequences Determine whether the sequence is arithmetic or geometric. Then write an explicit formula to represent the sequence.
-6, 2, 10, 18
O A arithmetic; A(1) 6, A(n) A(n-1) - 8
OB. geometric; A(n) = -6 + (n
1)(8)
o c. arithmetic; A(n)
= -6 + (n − 1) (8)
O
D. geometric; A(1) = -6, A(n)
= An - 1) - 8
23