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OpenStudy (anonymous):
Based on the pattern, what are the next two terms? 3, 12, 21, 30 ___, ____
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OpenStudy (anonymous):
39 and 48 it is increasing by 9
OpenStudy (anonymous):
This is an arithmetic series \[a_n = a_{n-1}+9:a_1 = 3\]so to find the nth term you add 9(n-1) to 3
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