The expression for ∫ x e^{3x} dx is

Lagos State University MAT102 2014 past question

1. (1/3)x e^{3x} - (1/9)e^{3x} + c
2. (1/3)e^{3x} - (1/9)x e^{3x} + c
3. (1/3)x e^{3x} + (1/9)e^{3x} + c
4. (-1/3)e^{3x} + (1/9)x e^{3x} + c

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