Question

The 20th term of an arithmetic sequence is 103, and the common difference is 3. Find a formula for the nth term.

Answer 1

\[a_n=40+3n\]

Answer 2

*43, dang

Answer 3

i need to use the formula a+(n-1)d. I know d in this problem is 3...but I dont know anything else :S

Answer 4

oh, recursive? gah

Answer 5

@zepdrix any help?

Answer 6

that formula is for arithmetic sequences...not recursive (that I know...)

Answer 7

arithmetic, I wrote the explicit formula, you want the recursive....

Answer 8

I forget how to do recursive, what is d?

Answer 9

oh wait is it\[a_n= a_{n-1} +3\] where when n=1 a_n = 43?