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UPSC NDA I 2015 Mathematics Solved Paper

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For the next two (2) items that follow :
Given that

d

dx

(

1+x2+x4

1+x+x2

)=Ax+B.

[NDA I 2015]

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Question : 91

Total: 120

What is the value of A ?

−1
1
2
4

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