What is the coefficient of x^ 10 in the expansion of (1-x^2)^ 20 (2-x^2- 1 x^2 )^ -5 ?

NDA 2024 Mathematics question

What is the coefficient of in the expansion of ?

Answer: (A)

. So x^2\dfrac{1}{x^2}$ = (- =

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Question ID VK-029801