Tìm I=tích phân (3x^2 - x + 1)e^x dx. I = (3x^2 - 7x +8)e^x + C7/22Tìm I=∫(3x2-x+1)exdx.I=(3x2-7x+8)ex+CI = (3x2 - 7x)ex + CI = (3x2 - 7x +8) + ex + CI = (3x2 - 7x + 3)ex + CGiải thích