In Exercises 17-22, find the sum of the first terms of the sequence. The sequence is either arithmetic or geometric. 17.

Question

In Exercises 17-22, find the sum of the first terms of the sequence.
The sequence is either arithmetic or geometric.
17. 2.5.8....: n=10
18. 14. 8. 2.:=9
1
2
3 3
21 ...:^= 11
19.4.-2.1.
20.6.-3.
21. -1, 11,
22.-2, 24,
...:=12
4'
121.... 9
288....=8

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