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Question

C0C1+C2C3+........+(1)nCn is equal to


A

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B

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C

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Solution

The correct option is C

0


We know that

(1+x)n=nC0+nC1x+nC2x2+......+nCnxn

Putting x = -1, we get

(11)n = nC0 - nC1 + nC2 - .......(1)n nCn

Therefore C0C1+C2C3+......(1)nCn = 0


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