资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,#,抛物线的解析式,驶向胜利的彼岸,1,抛物线的解析式驶向胜利的彼岸1,抛物线的解析式,驶向胜利的彼岸,一般式:,y=ax,2,+bx+c,顶点,对称轴,2,抛物线的解析式驶向胜利的彼岸一般式:y=ax2+bx+c顶点,抛物线的解析式,驶向胜利的彼岸,顶点式:,y=a(x-h),2,+k,(h,k),直线,:x=h,顶点,对称轴,h,(h,k),3,抛物线的解析式驶向胜利的彼岸顶点式:y=a(x-h)2+k(,抛物线的解析式,驶向胜利的彼岸,交点式:,y=a(x-x,1,)(x-x,2,),对称轴,与,x,轴交于,(x,1,0)(x,2,0),(x,1,0),(x,2,0),4,抛物线的解析式驶向胜利的彼岸交点式:y=a(x-x1)(x-,画出下列二次函数的示意图,并指出它的对称轴,顶点坐标,与,y,轴的交点。,yx,2,-3x-5,1.5,对称轴:,顶点,:,与,y,轴的交点,:,(0,-5),(0,-5),5,画出下列二次函数的示意图,并指出它的对称轴,顶点坐标,与y轴,y0.5(x-1)(x+3),-1,对称轴:,顶点,:,与,y,轴的交点,:,(0,-1.5),(-3,0),(1,0),(0,-1.5),(-1,-2),6,y0.5(x-1)(x+3)-1对称轴:顶点:与y轴的交点,y-2(x-1),2,-5,1,对称轴:,顶点,:,与,y,轴的交点,:,(0,-7),(0,-7),7,y-2(x-1)2-51对称轴:顶点:与y轴的交点:(0,y3(x+1)(x+3),-2,对称轴:,顶点,:,与,y,轴的交点,:,(0,9),(-3,0),(-1,0),(0,9),(-2,-3),直线,x=-2,8,y3(x+1)(x+3)-2对称轴:顶点:与y轴的交点:(,y2x,2,+5,对称轴:,顶点,:,与,y,轴的交点,:,(0,5),(0,5),直线,x=0(,即,y,轴,),(0,5),9,y2x2+5对称轴:顶点:与y轴的交点:(0,5)(0,5,y-2(x+2)(x-3),0.5,对称轴:,顶点,:,与,y,轴的交点,:,(0,12),(-2,0),(3,0),(0,12),直线,x=0.5,10,y-2(x+2)(x-3)0.5对称轴:顶点:与y轴的交点,y2(x+1),2,-1,对称轴:,顶点,:,与,y,轴的交点,:,(0,2),(0,2),(-1,0),直线,x=-1,11,y2(x+1)2-1对称轴:顶点:与y轴的交点:(0,2),y-2(x-1)(x-3),2,对称轴:,顶点,:,与,y,轴的交点,:,(0,-6),(3,0),(1,0),(0,-6),(2,2),直线,x=2,12,y-2(x-1)(x-3)2对称轴:顶点:与y轴的交点:(,y-3(x-3),2,3,对称轴:,顶点,:,与,y,轴的交点,:,(0,-27),(3,0),(0,-27),(3,0),直线,x=3,13,y-3(x-3)23对称轴:顶点:与y轴的交点:(0,-2,y-(x+3),2,+1,-3,对称轴:,顶点,:,与,y,轴的交点,:,(0,-8),(-3,1),(0,-8),(-3,1),直线,x=-3,14,y-(x+3)2+1-3对称轴:顶点:与y轴的交点:(0,y-2(x+2)(x-4),1,对称轴:,顶点,:,与,y,轴的交点,:,(0,16),(4,0),(-2,0),(0,16),(1,18),直线,x=1,15,y-2(x+2)(x-4)1对称轴:顶点:与y轴的交点:(,驶向胜利的彼岸,1,.,已知抛物线,y=ax,2,+bx+c,的对称轴为,x=2,,且经过点(1,4)和点(5,0),则该抛物线的解析式为,.,16,驶向胜利的彼岸 1.已知抛物线y=ax2+bx+c的对称轴,2.,求满足下列条件的二次函数解析式:,(,1,)二次函数的图像与,x,轴交于点,A(2,0),B(4,0),且图像过点,C(1,6),(,2,)二次函数当,x=1,时有最大值,y=4,且,x=0,时,y=0,(,3,)二次函数的图像可由函数,y=ax,2,-1,的图像,向左平移,2,个单位得到,且过点,M(-1,-3),17,2.求满足下列条件的二次函数解析式:17,驶向胜利的彼岸,已知抛物线,点,A(-1,y,1,),B(1,y,2,),C(2,y,3,),在这条抛物线上,比较,y,1,,y,2,,y,3,的大小,18,驶向胜利的彼岸已知抛物线 ,18,已知抛物线,点,A(-1,y,1,),B(1,y,2,),C(2,y,3,),在这条抛物线上,比较,y,1,,y,2,,y,3,的大小,(m0),驶向胜利的彼岸,19,已知抛物线 ,(m0)驶向胜利的彼岸19,已知抛物线,y=ax,2,+bx+c,的称轴是,:,直线,x=1,点,A(-1,y,1,),B(1,y,2,),C(2,y,3,),在这条抛物线上,比较,y,1,,y,2,,y,3,的大小,20,已知抛物线y=ax2+bx+c的称轴是:直线x=120,如图是抛物线,y=ax,2,+bx+c,-1,试判断,:,a,0,b,0,c,0,a+b+c,0,a-b+c,0,2a-b,0,2a+b,0,驶向胜利的彼岸,21,如图是抛物线y=ax2+bx+c-1试判断:驶向胜利的彼岸2,如图是抛物线,y=ax,2,+bx+c,1,试判断,:,a,0,b,0,c,0,a+b+c,0,a-b+c,0,b,2,-4ac,0,2a+b,0,驶向胜利的彼岸,22,如图是抛物线y=ax2+bx+c1试判断:驶向胜利的彼岸22,如图是抛物线,y=ax,2,+bx+c,1,试判断,:,a,0,b,0,c,0,a+b+c,0,4a-2b+c,0,b,2,-4ac,0,2a+b,0,2a-b,0,23,如图是抛物线y=ax2+bx+c1试判断:23,如图是抛物线,y=ax,2,+bx+c,1,试判断,:,ac,0,A+b+c,0,b,2,-4ac,0,2a+b,0,4a+2b+c,c,24,如图是抛物线y=ax2+bx+c1试判断:24,如图是抛物线,y=ax,2,+bx+c,试判断,:,a,0,b,0,c,0,a+b+c,0,4a-2b+c,0,b,2,-4ac,0,25,如图是抛物线y=ax2+bx+c试判断:25,如图是抛物线,y=ax,2,+bx+c,1,试判断,:,a,0,b,0,c,0,a+b+c,0,4a-2b+c,0,b,2,-4ac,0,2a+b,0,26,如图是抛物线y=ax2+bx+c1试判断:26,
展开阅读全文