Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
If the conjugate of a complex number is
1
i
−
1
\frac{1}{i - 1}
i
−
1
1
, where
i
=
−
1
i = \sqrt{-1}
i
=
−
1
, then what is the complex number? a.
−
1
i
−
1
\frac{-1}{i - 1}
i
−
1
−
1
b.
1
i
+
1
\frac{1}{i + 1}
i
+
1
1
c.
−
1
i
+
1
\frac{-1}{i + 1}
i
+
1
−
1
d.
1
i
−
1
\frac{1}{i - 1}
i
−
1
1
Browse the problem library