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Google is your friend.. Also
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Doesn't help, unfortunately

What's the question?

What is the fifth term of the sequence with general term an = 5n - 7 ?

18?

I hate you

I love you

You cannot do both, decide first.

"an = 5n-7", or "n = 5n-7"?

a sub n, @Aaqil

@Aaqil
a is the mentioned sequence of numbers, aₙ is the n-th element thereof, so a₅ = 5 * 5 - 7 = 18
Leficios probably just daydreamed about his waifus during the lecture.

I do that all the time!

How were you stuck that badly and why didn't you ask me this!