Algebra
Complex Numbers
True or False:
For complex numbers \(a\) and \(b\),
\[ |a| + |b| = |a+b|. \]
Evaluate
\[ i \times ( -i) . \]
Note: \(i \) is the imaginary unit, where \(i^2=-1\).
For any complex number \(z\), which of the following must be equal to
"the real part of the imaginary part of \(z\)"?
Which of the following is equal to
\[ \frac{ 1 + i } { 1 - i }? \]
Are real numbers also complex numbers?