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Ladonna
Ladonna

Ladonna

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Asked: 2020-11-05T00:29:22+00:00 In:

tìm GTLN của C = -|x-1|-|x+y|-1/2

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tìm GTLN của C = -|x-1|-|x+y|-1/2
tim-gtln-cua-c-1-y-1-2

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    1. Philomena

      Philomena

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      Có `-|x-1|≤0`

      `-|x+y|≤0`

      `=> – |x-1|-|x+y| ≤0`

      `=> -|x-1|-|x+y|-1/2≤-1/2`

      Dấu `=` xảy ra `<=> x = 1 ; x = -y`

      `<=> x = 1 , y = -1`

       

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