A) \[(n-1)\]
B) \[{{(-1)}^{n}}(1-n)\]
C) \[{{(-1)}^{n-1}}{{(n-1)}^{2}}\]
D) \[{{(-1)}^{n-1}}n\]
Correct Answer: B
Solution :
The coefficient ofin the expansion of = Coefficient ofin + Coefficient ofinYou need to login to perform this action.
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