1.
Let be the roots of Then the equation whose roots are and is
2.
The vector is turned counterclockwise through an angle of and stretched times. The complex number corresponding to newly obtained vector is
3.
If , then the complex number is
4.
For real values of the expression will assume all real values provided
5.
If is a factor of then the other factor is
6.
The centre of a square is at the origin and is one of its vertices. The extremities of its diagonals which does not pass through this vertex are
7.
If , where , then has at least
8.
If is equal to
9.
If , then
10.
Let be three collinear points which are such that and the points are represented in the Argand plane by the complex numbers 0, and respectively, Then,