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1. nth term = 4n   100th term = 400
2. nth term = 9n    29th term = 261
3. nth term = 2n+2
4. nth term = 3n+5
5. nth term = 3n+9
6. nth term = n+4 or 1n+4
7. nth term = 6n+1
8. nth term = 4n-4 or 4(n-1)
9. nth term = n²+8
10. nth term = n²-1
11. nth term = 2n²+1
12. nth term = 3n²+7
13. nth term = 2n³+3 n²+4n-5
14. nth term = n³+5n
15. nth term =

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