Question

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

Answer 1

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

Answer 2

4n-1? Does that work..

Answer 3

YES IT DOES

Answer 4

you can do differences

Answer 5

Yes it works

Answer 6

Random eight people looking at my question?:P

Answer 7

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

Answer 8

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

Answer 9

Got another one for you Access

Answer 10

I'll post it as a new question.