Write an expression for the most apparent nth term of the sequence (Assume that n begins with 1)
3, 7, 11, 15, 19

Question

Write an expression for the most apparent nth term of the sequence (Assume that n begins with 1)
3, 7, 11, 15, 19

lukecrayonz · Answer

I know how to do it, I just can't exactly think of something that works out, but I feel like it's obvious.

lukecrayonz · Answer

4n-1? Does that work..

lukecrayonz · Answer

YES IT DOES

anonymous · Answer

you can do differences

anonymous · Answer

Yes it works

lukecrayonz · Answer

Random eight people looking at my question?:P

lukecrayonz · Answer

YES! My next questions are sigma notation, the easiest thing ever.

accessdenied · Answer

arithmetic sequence
$$ a_n = a_1 + (n-1)d $$
d = common difference between terms, n = term, a_1 = first term of sequence

$$ \begin{split}
a_n &= 3 + (n-1)4\
&= 3 + (4n - 4)\
&= 4n - 1 \end{split} $$

but yeah

lukecrayonz · Answer

Got another one for you Access

lukecrayonz · Answer

I'll post it as a new question.