The sequence is defined recursively. Write the first four terms.a1 = 5; an = an-1 - 4
A. a1 = 5, a2 = 1, a3 = -3, a4 = -7
B. a1 = -4, a2 = -8, a3 = -12, a4 = -16
C. a1 = 5, a2 = 3 , a3 = -1 , a4 = -5
D. a1 = 5, a2 = 9 , a3 = 13 , a4 = 17
Answer: A
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from 
.
A. 
B. - 1
C. 20a + 
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