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Math Help - Prove that the inequality holds

  1. #1
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    Prove that the inequality holds

    a, b, c, d >= 0
    a, b, c, d <= 1

    prove that the following inequality holds:
    (a+b+c+d+1)^2 >= 4*(a^2+b^2+c^2+d^2)
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  2. #2
    Master Of Puppets
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    Have you tried expanding out the left hand side?
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