Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.an = an-1 + 10, a1 = 13
A. an = 10n + 3, a20 = 203
B. an = 10n + 23, a20 = 223
C. an = 3n + 10, a20 = 70
D. an = 13n - 3, a20 = 257
Answer: A
Mathematics
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