SOLUTION: the nth term of an AP is 4n - 5. Then the 15th term is?

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Question 990456: the nth term of an AP is 4n - 5. Then the 15th term is?
Answer by KMST(5328) About Me  (Show Source):
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In an AP (arithmetic progression, or arithmetic sequence),
a%5B1%5D= the first term,
d= the common difference (the difference between consecutive terms), and
a%5Bn%5D=a%5B1%5D%2B%28n-1%29%2Ad= the nth term ,
but we do not need to know any of that to answer the question.

To find the 15th term, we substitute n=15 in 4n-5 ,
to find that the value of the 15th term is
4%2A15-5=60%2A5=highlight%2855%29 .