Determine whether the sequencei s arithmetic or not. if it is, find the common difference and the next three terms.
1. 2, 5, 8, 11,...
2. 2, -4, 6, -8, 10,...
3. -6, -10, -14, -18,...
4. 40, 42, 44, 46,...
5. 1.2, 1.8, 2.4,...
6. 1, 5, 9, 13,...
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Answer:
1.arithmetic
d=3
2.not
3.arithmetic
d=-4
4.arithmetic
d=2
5.arithmetic
d=.6
6.arithmetic
d=4