SOLUTION: What is the nth term of the arithmetic sequence a[7]=34, a[18]=122?

SOLUTION: What is the nth term of the arithmetic sequence a[7]=34, a[18]=122?

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Question 598451: What is the nth term of the arithmetic sequence a[7]=34, a[18]=122?
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
the common difference is essentially the slope of an arithmetic progression.
,

leads us to

We can rewrite the nth term as

Now using the 7th term we write

nth term:

:)
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