Find the nth term for the following sequences,
1. 2, 6, 12, 20, 30
2. 3, 10, 21, 36, 55
3. 0, 5, 12, 21, 32
4. 1, 9, 19, 31, 45
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Answer:
21
Step-by-step explanation:
21 is the answrrs of this question
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