3 years ago

-2, 5, 12, 19,... write the recursive rule for each sequence

Mathematics

2 answers:

quester [9]3 years ago

6 0

-2+7=5
5+7=12
12+7=19 so,
7n-9

Delvig [45]3 years ago

6 0

a(1) = -2< -------the 1st term is -2

recursive formula: a(n) = a(n-1) + 7) < --- adding 7 to the previous term

a(2) = a(1) + 7 = (-2) + 7 = 5

a(3) = a(2) + 7 = 5 + 7 = 12

a(4) = a(3) + 7 = 12 + 7 = 19

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