The sequence is defined recursively. Write the first four terms.a1 = z; an = an-1 + S
A. a1 = z, a2 = S, a3 = 2S, a4 = 3S
B. a1 = z, a2 = z - S, a3 = z - 2S, a4 = z - 3S
C. a1 = S, a2 = S + z, a3 = S + 2z, a4 = S + 3z
D. a1 = z, a2 = z + S, a3 = z + 2S, a4 = z + 3S
Answer: D
Mathematics
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A. - 
B. 
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