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Math Help - prove that

  1. #1
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    prove that

    |x+2| less than or = 1......is |x|= or less than 3
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  2. #2
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    Quote Originally Posted by lebanon View Post
    |x+2| less than or = 1......is |x|= or less than 3

    It's not clear what you meant, but |x+2|\leq 1\Longleftrightarrow -1\leq x+2\leq 1\Longleftrightarrow -3\leq x\leq -1 ...

    Tonio
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