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Автор - fyarvyk

Найдите значение выражения  frac{ sqrt{ x^{2}-2 sqrt{2}x+2 }+ sqrt{ x^{2} +2 sqrt{2}x + 2 }  }{ sqrt{2} }

Ответ

Проверено экспертом

Автор - Матов
  <br />
 frac{sqrt{x^2-2sqrt{2}x+2}+sqrt{x^2+2sqrt{2}x+2} } {sqrt{2} }        = frac{ sqrt{(x-sqrt{2})^2}+sqrt{(x+sqrt{2})^2}}{ sqrt{2}  }\  x leq sqrt{2}\<br />
     frac{ sqrt{2}-x+x+sqrt{2}}{ sqrt{2}} = 2\\<br />
  x geq  sqrt{2}\<br />
          frac{ x-sqrt{2} + x+sqrt{2}}{ sqrt{2}} = sqrt{2}x

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