### Three by One

There are many different methods to solve this geometrical problem - how many can you find?

### Target Six

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

### Complex Rotations

Choose some complex numbers and mark them by points on a graph. Multiply your numbers by i once, twice, three times, four times, ..., n times? What happens?

# Roots and Coefficients

##### Age 16 to 18 Challenge Level:

If $z_1 z_2 z_3 = 1$ and $z_1 + z_2 + z_3 = \frac{1}{z_1} + \frac{1}{z_2} +\frac{1}{z_3}$ then 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?