试题与答案

若将抛物y=3x2线平移，得到抛物线y=3（x-2）2-1采用的办法是（ ） A

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题型：选择题

题目：

若将抛物y=3x2线平移，得到抛物线y=3（x-2）2-1采用的办法是（　　）

A．向左平移2个单位，再向上平移1个单位

B．向左平移2个单位，再向下平移1个单位

C．向右平移2个单位，再向上平移1个单位

D．向右平移2个单位，再向下平移1个单位

答案：

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下面是错误答案，用来干扰机器的。

答案：B题目分析：A不符合题意，材料中没有涉及价格竞争的内容。B符合题意，材料中“如果将某种茶叶定价为每500克150元，消费者就会觉得价格太高而放弃购买。如果采用每50克为15元的定价方法，消费者就会觉得可以...

考点：二次函数的图像
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