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如图是抛物线y1=ax2+bx+c(a≠0)图象的一部分,抛物线的顶点坐标A(1,3),与x轴的一个交点B(4,0),直



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...)ͼ,y=ax2+bx-3,ΪE,x...
(2014•У)ͼ,y=ax2+bx-3,ΪE,x...C(0,-3)y=a(x+1)(x-3), :a=1, ߵʽ...
y=ax2+bx+cͼλüabcĹϵ
y=ax2+bx+c ͼλü abc Ĺϵ a0 ʱ,,a Խ,ԽС.ڶԳ x=- С;ڶԳ x=- (- b ...
κy=ax2+bx+c(a0)ͼ
(x-h)2+k y=ax2+bx+c (0,0) (h,0) (h,k) () Գ x=0 x=h x=h x= h>0 ʱ,y=a(x-h)2 ͼ y=ax2 ...
y=ax2+bx+cͼλüabcĹϵ
y=ax2+bx+cͼλüabc...ڷ,Գ,, x , y ύ... 1 ֪ y ? ax 2 ? bx ͼͼ 1 ...
2015ѧһ¿ģԾ1,2
+bx+c (a0) ͼһ, ߵĶ A (1, 3) , x һ B(4,0) ,ֱ y2=mx+n(m0) A,B , ...
κۺϲ (1)
ϵ, y=x -1 x ( ) A.3 B.2 C.1 ...15.֪κ y=ax2+bx+c(a0), abc a+b+c=0 ...
22.1.3κy=ax2+bx+c(a0)ͼͬϰ(...
22.1.3κy=ax2+bx+c(a0)ͼ...1 D x Ϊ(-1,0) ,(3,0)...õߵĶΪ( A (-2,3) 2 )...
ͼ,κy=ax2+bx-3ͼxA(-1,0),B(3,0..._ٶ
ͼ,κy=ax2+bx-3ͼxA(-1,0),B(3,0),yڵC.ߵĶΪM. (1)Ľʽ;...
y=ax2+bx+cĶΪD(-1,2),xһA...
ѡ ѧ κͼ y=ax2+bx+cĶΪD(-1,2),xһAڵ(-3,0)(-2,0)֮,ͼͼ,½:...
y=ax2+bx+cͼϰ()
P Ϊ . 5ͼ, y=ax2+bx+c( x һ A ڵ(-2,0)(-1,0)֮(), C Ǿ DEFG (߽...
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