# Complex number

• Oct 16th 2009, 04:03 AM
pankaj
Complex number
1.Let $z$ be a complex number such that $|z| = 1.$

Find the minimum and maximum value of

$|1 + z| + |1 - z + z^2|$

2.If $a>0$ and $|z+\frac{1}{z}|=a$.

Then find minimum and maximum value of $|z|$

What does the equation

$|z+\frac{1}{z}|=a$

denote geometrically.
• Oct 16th 2009, 06:59 AM