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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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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+c ͼλü abc Ĺϵ a0 ʱ,,a Խ,ԽС.ڶԳ x=- С;ڶԳ x=- (- b ...
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;...
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ͼ ֱڵA(0,8)B(...1 2 ? 1 ,ax2-5x+c=0,7x2+1=0, ...+bx+c(a0)ͼһ,x=1 ǶԳ,...
y=ax2+bx+cͼλüabcĹϵ
y=ax2+bx+cͼλüabc...ڷ,Գ,, x , y ύ... 1 ֪ y ? ax 2 ? bx ͼͼ 1 ...
ͼ,y=ax2+bx+cxڵA(-1,0),Ϊ(...
ͼ,y=ax2+bx+cxڵA(-1,0),Ϊ(1,n),y(0,2)(0,3)֮(˵),н:...
ͼǶκy=ax2+bx+c(a0)ͼһ,x=-1Ƕ...
ͼκy=ax2+bx+c(a0)ͼһ,x=-1ǶԳ,ж:b-2a=0;4a-2b+c<0;a-b+c=-9a;(-3,y1),(...
2015ѧһ¿ģԾ1,2
+bx+c (a0) ͼһ, ߵĶ A (1, 3) , x һ B(4,0) ,ֱ y2=mx+n(m0) A,B , ...
аѧ2016 (һ)ѧ
(-1,0) A.(-3,0) 5.ͼʾ,ü...y ? A.x3 1 ȡֵΧ( x?3 ) D.x...ax 2 +bx+c (a0)ͼԳֱx=1...
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x ,ֱ C y , y=ax +bx+c (a0)ǡþ...A.3 B.4 C.3 3 D.4 3 2 10.ͼ,֪ A(12,0),O Ϊԭ,...
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