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Sequence formula [itex]a_{n}[/itex]=((last term)  (n1)(common diff)) 
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#1
Apr1713, 08:31 PM

P: 136

Calc 2 will require some basic knowledge of sequences and series. Since this topic has never been covered in any of my past math classes, I am currently learning about sequences and series from scratch. On youtube, I found a video that contains an explanation of the General Term of the Arithmetic Sequence formula. It also contains another form which does not exist in my Algebra Textbook:
[itex]a_{n}[/itex] = ((last term)  (n1)(common diff)) However, I think the person providing the youtube explanation makes a mistake in notation, which is causing me some confusion. If he has written this portion of his presentation correctly, then I will have to go back and review my confusion. So if anyone has a moment, could you fact check the portion of the derivation of this formula at exactly 9:16  9:23 http://www.youtube.com/watch?v=dbuwv...BFE1A5A41BC8D6 To me it seems [tex]a_{n} a_{n1} [/tex] should equal d, not d , so did he intend to write [tex]a_{n}  a_{n+1} = d[/tex] 


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