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Mathematics
Problem
Mark the correct answer for
(
1
+
i
)
−
1
=
(1+i)^{-1}=
(
1
+
i
)
−
1
=
? a)
(
−
1
2
+
1
2
i
)
\left(-\frac{1}{2}+\frac{1}{2} i\right)
(
−
2
1
+
2
1
i
)
b)
(
2
−
3
i
)
(2-3 i)
(
2
−
3
i
)
c)
(
1
2
−
1
2
i
)
\left(\frac{1}{2}-\frac{1}{2} i\right)
(
2
1
−
2
1
i
)
d)
(
2
−
i
)
(2-i)
(
2
−
i
)
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