1. The problem statement, all variables and given/known data Integrate ettdt using integration by parts. 2. The attempt at a solution Seems like a very easy problem; however, I just started learning integration by parts-- didn't understand this. So the book's method: u=t dv=etdt du=dt v= et uv-∫vdu=tet-∫etdt=tet-et+C. My method: u=et dv=tdt du=etdt v=t2/2 uv-∫vdu=ett2/2-∫(t2/2)etdt My method seems wrong, so can anyone please answer me why my method won't work? Is it just about assigning the correct values to the correct variables?