Q.If (1+x)n = n r r 0 C x = ∑ ∑, then 3 1 2 n 0 1 2 n 1 C C C C 1 1 1.... 1 C C C C − − + + + + = + + + + = + + + + = + + + + =
Correct answer: () n n 1 n! +
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Question #45,200
Math Chapter Wise question with answer
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