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Math Help - Calculate a

  1. #1
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    Calculate a

    Designate by (Un) te sequence defined by : U1=2
    2Un+1=Un+1
    Let (Vn) be the sequence defined by Vn=Un +a
    calculate a so that the sequence (Vn) is goemetric .
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  2. #2
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    Re: Calculate a

    Quote Originally Posted by lebanon View Post
    Designate by (Un) te sequence defined by : U1=2
    2Un+1=Un+1
    Let (Vn) be the sequence defined by Vn=Un +a
    calculate a so that the sequence (Vn) is goemetric .
    this equation makes no sense ... are either of the (n+1) 's supposed to be subscripts?
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  3. #3
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    Re: Calculate a

    1. Go back and reread the problem. What you have written is impossible.

    2. Try! What do you know about geometric series? What are the first three or four values of U_n: U_2, U_3, U_4? Can you guess the general formula for U_n?
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