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选修4-5:不等式选讲 设函数f(x)=|2x-4|+|x+2| (Ⅰ)求函数y

题型:选择题

题目:

选修4-5:不等式选讲

设函数f(x)=|2x-4|+|x+2|

(Ⅰ)求函数y=f(x)的最小值;

(Ⅱ)若不等式f(x)≥|a+4|-|a-3|恒成立,求a的取值范围.

答案:

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SNAKE MILKER: This involves taking the poison out of a snake’s teeth. You hold the snake over a glass and make it open its mouth very wide. The poison will then drip from the back of the teeth into the glass; this is known as milking the snake. You have to be very brave if you want to try this.

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