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For  N, if                       x 2 x 2 x e e x log e x dx = x x x e 1 e x 1                  + C, where e =    0 n ! n 1 and C is constant of integration, then  + 2  + 3  – 4  is equal to -

1. 1
2. 4
3. – 4
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Correct answer: 4

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