1. -5
2. 10
3. -15
4. 20
5. -25
6. 30
7. -35
8. 40
9. -45
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They are: nth term = 6n-4 and the 14th term is 80
The given sequence is 11, 31, 51, 72 The nth term of this sequence can be expressed as an = 11 + (n - 1) × 20 Therefore, the nth term is 11 + (n - 1) × 20, where n is the position of the term in the sequence.
20-9x=n
It is: 26-6n