In the expression: (x + 1) (x + 4) (x + 9) (x + 16) … (x + 400), the coefficient of x19 is….

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In the expression: (x + 1) (x + 4) (x + 9) (x + 16) … (x + 400), the coefficient of x¹⁹ is

Options :-

1. 2870
2. 210
3. 4001
4. 1900

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