The number of real negative terms in the binomial expansion of \( (1+i x)^{4 n-2}, n \in N, n0, ...

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The number of real negative terms in the binomial expansion of \( (1+i x)^{4 n-2}, n \in N, n0, i=\sqrt{-1} \), is
(a) \( n \)
(b) \( n+1 \)
(c) \( n-1 \)
(d) \( 2 n \)
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