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If (1+x)n=n∑r=0nCrxr and n∑r=01nCr=a, then the value of ∑0≤i≤n ∑0≤j≤n(inCi+jnCj) is equal to |
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Answer» If (1+x)n=n∑r=0nCrxr and n∑r=01nCr=a, then the value of ∑0≤i≤n ∑0≤j≤n(inCi+jnCj) is equal to |
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