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Math Help - arithmetic sequence

  1. #1
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    arithmetic sequence

    Find the nth term of the arithmetic sequence whose initial term is 1 and common difference is 2 Your answer must be a function of n .

    seems easy i think it would be 1+2n but thats not right anyone know what im doing wrong
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  2. #2
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    Quote Originally Posted by dat1611 View Post
    Find the nth term of the arithmetic sequence whose initial term is 1 and common difference is 2 Your answer must be a function of n .

    seems easy i think it would be 1+2n but thats not right anyone know what im doing wrong
    That would make the first term a_1=3, unless you want to start from n=0. Try:

    a_n=-1+2n

    or:

    a_n=1+2(n-1)

    CB
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