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Math Help - Arithmetic Sequence

  1. #1
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    Arithmetic Sequence

    An arithmetic sequence is given for each question below whose initial term a and common difference d are also given. What is the firth term?

    (1) a = 6; d = -2

    (2) a = sqrt{2}; d = sqrt{2}

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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by magentarita View Post
    An arithmetic sequence is given for each question below whose initial term a and common difference d are also given. What is the firth term?

    (1) a = 6; d = -2

    (2) a = sqrt{2}; d = sqrt{2}
    To find the nth term, a_n, in an arithmetic sequence, use the following formula:

    a_n=a_1+(n-1)d, where the first term is a_1 and the common difference is d

    (1) a_5=6+(5-1)(-2)=??

    (2) a_5=\sqrt{2}+(5-1)(\sqrt{2})=??
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  3. #3
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    I get it...

    Quote Originally Posted by masters View Post
    To find the nth term, a_n, in an arithmetic sequence, use the following formula:

    a_n=a_1+(n-1)d, where the first term is a_1 and the common difference is d

    (1) a_5=6+(5-1)(-2)=??

    (2) a_5=\sqrt{2}+(5-1)(\sqrt{2})=??
    Your easy steps and guidance has increased my understanding of precalculus. I hope you will help me when I enter calculus 1 not too long from now.
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