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givi [52]
3 years ago
11

A recursive rule for an arithmetic sequence is a1=4;an=an−1+3 . What is an explicit rule for this sequence? Enter your answer in

the box. an=
Mathematics
2 answers:
ZanzabumX [31]3 years ago
6 0

Answer:

a_{n}=4+3(n-1)

Step-by-step explanation:

The given recursive rule is

a_{1}=4\\a_{n}=a_{n-1}+3

According to this recursive rule, the sequence is

4, 7, 10, 13, 16, 19,...

Because, the recursive rule states that each new term must be 3 units greater.

Now, an explicit form of this sequence could be found using this formula

a_{n}=a_{1}+(n-1)d

Where d=3 and a_{1}=4

Replacing these values, we have

a_{n}=4+3(n-1)

Therefore, the explict form is a_{n}=4+3(n-1), which can be used to find any tem of the arithmetic sequence.

avanturin [10]3 years ago
5 0

Answer:

an=3n+1

Step-by-step explanation:

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