# Complexity Is Awesome!

Algebra Level 5

The equation $$x^{10}+(13x-1)^{10}=0$$ has $$10$$ complex roots: $$r_1, \overline{r_1}, r_2, \overline{r_2}, r_3, \overline{r_3}, r_4, \overline{r_4}, r_5, \overline{r_5},$$ where the bar denotes complex conjugation. Evaluate the expression below.

$\dfrac 1{r_1\overline{r_1}}+\dfrac 1{r_2\overline{r_2}}+\dfrac 1{r_3\overline{r_3}}+\dfrac 1{r_4\overline{r_4}}+\dfrac 1{r_5\overline{r_5}}$

###### Image Credit: Wikimedia Decagon by László Németh
×

Problem Loading...

Note Loading...

Set Loading...