Question

Объясните пожалуйста)​

Answer 1

Ответ:   $\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\la\la\la\la\ddddddddddddddddddddddddddddddddcleverdddddd\ffffffffffffffffffffffffffffffffffffffff\pppppppppppppppppppppppppppppppppppp\ddddddddddddddddddd\displaystyle\ \Large \boldsymbol{x+\frac{1}{x} =\pm6}$

Объяснение:

$\displaystyle\ \Large \boldsymbol{x+\frac{1}{x} =?} \\\\\\x^2+\frac{1}{x^2} =34\\\\\\ \bigg(x+\frac{1}{x} \bigg)^2=x^2+2\ \frac{1}{x\!\!\!\!\diagup} \cdot x\!\!\!\!\diagup+\frac{1}{x^2} \\\\\\\bigg(x+\frac{1}{x} \bigg)^2=\underbrace{x^2+\frac{1}{x^2}}_{34} +2 => \\\\\\\bigg(x+\frac{1}{x} \bigg)^2=36 \ \ then \\\\\\x+\frac{1}{x} =\pm6$