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If $x > 0,$ then the number of positive terms in the expansion of $(1 + i x)^{4 n}$ is

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detailed solution

Correct option is A

Positive terms are 4nC0, 4nC4x4, 4nC8x8,…,4nC4nx4n∴ number of positive terms =(n+1).

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If x > 0, then the number of positive terms in the expansion of (1+ix)4n is

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If $x > 0,$ then the number of positive terms in the expansion of $(1 + i x)^{4 n}$ is