将抛物线y=-3(x-2)^2向下平移k个单位后与y轴交于点(0,-14),则K=?
问题描述:
将抛物线y=-3(x-2)^2向下平移k个单位后与y轴交于点(0,-14),则K=?
答
=-3(x-2)^2向下平移k个单位后为
y=3(x-2)²-k
y=3x²-12x+12-k 与y轴交于点(0,-14)
12-k=-14
k=26,