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Q.The coefficient of $x^{n}$ in $(1+x)^{2n} (1+x)^{2n+1}$ is

a

\binom{4n+1}{n}

b

\binom{4n}{n}

c

\binom{4n+1}{2n}

d

\binom{4n+1}{2n+1}

Correct Answer: Option D

The correct solution involves applying the fundamental concept to derive the final value step by step...

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The coefficient of x^{n} in (1+x)^{2n} (1+x)^{2n+1} is... | ParikshaNiti