If limx→1 1+ax+bx2cx-1=e3, then the value of bc is ______
limx→1 1+ax+bx2cx-1=e3or e limx→1 1+ax+bx2-1cx-1=e3or elimx→1 cax+bx2x-1=e3or limh→0 cax+bx2x-1=3or limh→0 ca1+h+ba+h21+h-1=3or limh→0 ca+b+ac+2bh+bh2h=3or ca+b=0 and ac+2b=3or b=3 and ac=-3Also, the form must be 1∞ for which a+b =0, i.e., a=-3 and c=1.