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If the coefficient of x^((n^(2)+n-18)/2) in (x-1)(x^(2)-2)(x^(3)-3)(x^(4)-4)….(x^(n)-n), where (nge8) is k, then k is equal to ___________ |
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Answer» `=9+(-8xx-1)+(-7xx-2)+(-6xx-3)+(-5xx-4)+(-6xx-2xx-1)+(-5xx-3xx-1)+(-4xx-3xx-2)=0` |
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