12 kg 850 g + 2 kg 350 g = ________
Let (1+x+x2)2014=a0+a1x+a2x2+a3x3+....+a4028x4028 and letA=a0−a3+a6−......+a4026,B=a1−a4+a7−......−a4027,C=a2−a5+a8−......+a4028Then