Answer:
The 10th Term is; 33.
The 21st Term is; 77
Explanation:
You need to add 4 each time to get a term. The first term is -3 so -3+4=1. Then 1+4=5, and 5+4=9 and so on.
-3. 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77
33, 77
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