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Mathematics
Problem
Decide whether these sequences are arithmetic: a.
a
7, 15, 23, 31, 39, .... b.
b
10, 14, 18, 20, 24, .... c.
c
41, 35, 29, 23, 17, .... d.
d
6, 1, -6, -11, -16, ....
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