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Does it Have it?

Probability Level 2

$\big(x - 1\big)\big(x^2 - 2\big)\big(x^3 - 3\big)\cdots \big(x^{20} - 20\big)$

What is the coefficient of $x^{203}$ in the expansion of this expression?

-7

0

6

10

13

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by Ravneet Singh

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