EAMCET Engineering 2007 Solved Paper

Section: Mathematics

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Question : 92 of 160

Marks: +1, -0

The coefficient of xk in the expansion of ‌

1−2x−x2

e−x

is

‌
1−k−k2
k!
‌
k2+1
k!
‌
1−k
k!
‌
1
k!

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