Question

Find the 18th term of the sequence 5, 8, 11, 14, 17...



a. An 18th term does not exist
b. 53
c. 56

Answer 1

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Answer 2

By the way, the \(n\) term of an arithmetic sequence is \(a_1 \times (n - 1)d\)

Answer 3

What does d mean?

Answer 4

The common difference is \(d\).

Answer 5

You just subtract the second term from the first term, and you get \(d\). Here, \(d = 8 - 5\)

Answer 6

What's a1?

Answer 7

The first term. Here, it is \(3\).

Answer 8

The first term is the same as the common difference? How did you get 3?

Answer 9

COME BACK

Answer 10

is it 53?

Answer 11

I need serious help

Answer 12

general formula is
\[a_{n}=3n+2\]
when n=18
\[a_{18}=3(18)+2=56\]