4 3 2
P(x)=4x −11x −2ax +5bx−6
2
Q(x)=x −2x 3−
P= a −8a +11a + b −8b +11b ! " # a=4+ 5, b=4− 5
$ % & ' () *
6x y xy 5x 5y 6 0 20x y 28x 9 0
+, - + % ' () * 6x2+10y2+2xy x− −28y 18+ =0
a+b+c=
*
2 c(c 9a ) a(4a b ) b(9b 4c )
<(4 ; AI = (O) 7 > # ?
BM AC AM BC+ =AB.MC
2013 A , A , , A1 2 2013 (4 5 (O, 1) D E A B 3 6 ' ;
MA +MA + MA+ ≥2013
H