Question

Нийдите значение выражения

Answer 1

$\frac{1}{2+\sqrt{6}} +\frac{1}{2-\sqrt{6}} = \frac{2+\sqrt{6}+2- \sqrt{6}} {2^{2}-(\sqrt{6})^{2}}= \\ = \frac{4}{4-6}= \frac{4}{-2}= -2$