Math Help - seqences help!

write down the terms indicated in each of these arithmetic series.



I worked out what the 12th term is, using this formulae

but I am not sure how to work out the nth term? do i use the same formulae?

Originally Posted by Tweety

write down the terms indicated in each of these arithmetic series.



I worked out what the 12th term is, using this formulae

but I am not sure how to work out the nth term? do i use the same formulae?

yes put 1/4 as "a"
and 5/8 as "d"