So my question is asking whats the first term in this a_{n}=2n-4 I know the common difference is 2 and it is arithmetic but can't figure out the first term

Thanks for any help

Fyi I tired 0, 1,-2 and n all wrong

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- March 9th 2013, 10:58 AMM670arithmetic sequences.
So my question is asking whats the first term in this a

_{n}=2n-4 I know the common difference is 2 and it is arithmetic but can't figure out the first term

Thanks for any help

Fyi I tired 0, 1,-2 and n all wrong - March 9th 2013, 11:32 AMmajaminRe: arithmetic sequences.
There are many possibilities, as your question is not stating the set of n's on which a_n is calculated. Sounds like a high school question which typical means n=1 is the first term. What answer do you get for this value?

- March 9th 2013, 11:37 AMM670Re: arithmetic sequences.
Sadly its a university course and at n=1 I get -2 as an answer but the online homework rejected that as I stated I have tired 0, 1,-2 and n I have one attempt left...

- March 9th 2013, 11:54 AMmajaminRe: arithmetic sequences.
That's correct (-2). Very strange indeed and it sounds like there is an error in the question. You could try an answer of 1 (as in, n=1), because the most logical answers are not working. Good luck!

- March 9th 2013, 12:04 PMM670Re: arithmetic sequences.
Now -2 worked I hate webworks