You may also like

Roots and Coefficients

If xyz = 1 and x+y+z =1/x + 1/y + 1/z show that at least one of these numbers must be 1. Now for the complexity! When are the other numbers real and when are they complex?

Target Six

Show that x = 1 is a solution of the equation x^(3/2) - 8x^(-3/2) = 7 and find all other solutions.

8 Methods for Three by One

This problem in geometry has been solved in no less than EIGHT ways by a pair of students. How would you solve it? How many of their solutions can you follow? How are they the same or different? Which do you like best?

Thousand Words

Age 16 to 18
Challenge Level
The whole point of the question is for you to find the right diagrams. You need to know that the distance between two points $a$ and $b$ in the complex plane (Argand Diagram) is given by $|a-b|$.

By definition $e^{i\alpha}= \cos \alpha + i\sin \alpha$ so where does this lie in the complex plane? Now what about $e^{i\beta}$?