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Math Help - Elements in inequalties

  1. #1
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    Jan 2008
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    Elements in inequalties

    Let S = {-2, -1, 0, 1/2, 1, √2, 2, 4}. Determine which elements of S satisfy the inequality. (Select all that apply.)
    x - 0.6 > 0

    wouldnt all but -2,-1, 1/2 and 0 work? i tried entering this but it said i was wrong.


    Let S = {-2, -1, 0, 1/2, 1, √2, 2, 4}. Determine which elements of S satisfy the inequality. (Select all that apply.)
    x2 - 1 < 1

    i tried all but 2 and 4 but again im wrong for some reason.


    Let S = {-2, -1, 0, 1/2, 1, √2, 2, 4}. Determine which elements of S satisfy the inequality. (Select all that apply.)
    10x - 9 ≥ x
    -2
    -1
    0
    1/2
    1
    √2
    2
    4
    None of them

    no idea on this one
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  2. #2
    Junior Member Singular's Avatar
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    1)
    elements that satisfy x-0.6 > 0 are 1,√2,2,4

    2)
    elements that satisfy x^2-1 > 1 are 1,1/2,0,-1,-2

    3)
    elements that satisfy 10x-9 ≥ x are 1,2,4,√2
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