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The integral ∫ + − x x 1 x 2 4 3 dx is equal to : (Here C is a constant of integration)

1. C x 1 x log 2 3 e + +
2. C x 1 x log 2 1 2 3 e + +
3. C x 1 x log 3 e + +
4. C x ) 1 x ( log 2 1 3 2 3 e + +

Correct answer: C x 1 x log 3 e + +

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