I need a little help with this question: Why do I not use (n-1) in the 'General Term of An Arithmetic Sequence' when I am given the first term a "sub 1"= 250 and d= -70 to write the first six terms of an arithmetic sequence? Thanks. :)

Question

I need a little help with this question: Why do I not use (n-1) in the 'General Term of An Arithmetic Sequence' when I am given the first term a "sub 1"= 250 and d= -70 to write the first six terms of an arithmetic sequence?  Thanks. :)

tkhunny · Answer

Isn't $$a_{1}$$ the SECOND term in the sequence?

day_2010 · Answer

Hmm as in the formula, yes.

day_2010 · Answer

|dw:1352155823641:dw| sloppy I know lol :)