Let i=sqrt(-1). If ((-1+isqrt3)^(21))/(...

Let `i=sqrt(-1)`. If `((-1+isqrt3)^(21))/((1-i)^(24))+((1+isqrt3)^(21))/((1+i)^(24))=k`, and n = [|k|] be the greatest integral part of |k|. Then `sum_(j=0)^(n+5)(j+5)^2-sum_(j=0)^(n+5)(j+5)` is equal to _______ .

Let i=sqrt(-1). If ((-1+isqrt3)^(21))/((1-i)^(24))+((1+isqrt3)^(21))/...
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S=sum(i=1)^(n)sum(j=1)^(i)sum(k=1)^(j)1
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sum sum (0 <= i <j<k<=n)1 is equal to
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sum(i=1)^(oo)sum(j=1)^(oo)sum(k=1)^(oo)(1)/(2^(i+j+k)) is equal to
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If sum(r=1)^(n)t(r)=sum(k=1)^(n)sum(j=1)^(k)sum(i=1)^(j)2, then sum(r=...
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sum(i=1)^(oo)sum(j=1)^(oo)sum(k=1)^(oo)(1)/(a^(i+j+k)) is equal to (wh...
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The value of sum(i=1)^(n)sum(j=1)^(i)sum(k=1)^(j)=220 , then the value...
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The value of sum(i=1)^(n) sum(j=1)^(i) sum(k=1)^(j) 1 is
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Evaluate sum(i=0)^(n-1) sum(j= 1 + i)^(n+1)""^(n)C(i) ""^(n+1)C(j) .
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Let `i=sqrt(-1)`. If﻿ `((-1+isqrt3)^(21))/((1-i)^(24))+((1+isqrt3)^(21))/((1+i)^(24))=k`, and n = [|k|] be the greatest integral part of﻿ |k|. Then `sum_(j=0)^(n+5)(j+5)^2-sum_(j=0)^(n+5)(j+5)` is equal to﻿ _______ .