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NISA [10]
3 years ago
5

Indicate a general rule for the nth term of this sequence. 12a, 15a, 18a, 21a, 24a, . . .

Mathematics
1 answer:
Vikki [24]3 years ago
3 0
It is an arithmetic progression. Note the general rule for AP sequences:

a(n) = a(1) + (n - 1)d
a(1) = 12a (first term)
d = 3a (common difference)

General rule: a(n) = 12a + (n - 1)*3a
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