Posted by Scott on Tuesday, December 18, 2007 at 6:33am.
Write a formula for the general term(the nth term)of the arithmetic sequence. Do not use a recursion formula. Then use the formula for a(n) to find the indicated term of the sequence Find a(11); 12, 10, 8, ...
I came up with 10 ?

PreCal  drwls, Tuesday, December 18, 2007 at 8:06am
a = 12  2(n1) = 14  2n
The n=1 term is 12 and each successive term decreases by 2.
Plug in n=11 and see what you get. I get 8.
12, 10, 8, 6, 4, 2, 0, 2, 4, 6, 8