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Mathematics
Problem
If
(
1
+
i
)
2
n
+
(
1
−
i
)
2
n
=
−
2
n
+
1
(1+i)^{2n} + (1-i)^{2n} = -2^{n+1}
(
1
+
i
)
2
n
+
(
1
−
i
)
2
n
=
−
2
n
+
1
(where,
i
=
−
1
i = \sqrt{-1}
i
=
−
1
) for all those
n
n
n
, which are a. even b. odd c. multiple of 3 d. None of these
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