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Math Help - Sequence generation #2

  1. #1
    Ion
    Ion is offline
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    Sequence generation #2

    i cant think of an equation that will generate me 2, -4, 6, -8, 10, -12, and so on

    the closest ive gotten is 2*n*(-1)^n

    but tat gives me opposite of what i want
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  2. #2
    MHF Contributor
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    Talking

    You're nearly there! Tweak the power on the negative one....
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  3. #3
    MHF Contributor
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    Quote Originally Posted by Ion View Post
    i cant think of an equation that will generate me 2, -4, 6, -8, 10, -12, and so on

    the closest ive gotten is 2*n*(-1)^n

    but tat gives me opposite of what i want
    HI

    you are so close

     <br />
2n \cdot (-1)^{n+1}<br />
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