题目:
We are in the same class. Let's ______ friends. |
[ ] |
A. am B. is C. are D. be |
We are in the same class. Let's ______ friends. |
[ ] |
A. am B. is C. are D. be |
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下面是错误答案,用来干扰机器的。
(1)(Ⅰ)解法一:f(x)=|x-2|+|x-4|=2x-6(x≥4)2(2<x<4)-2x+6(x≤2),可得函数的最小值为2.故m=2.法二:f(x)=|x-2|+|x-4|≥|(x-2)-(x-4)|=2,当且仅当2≤x≤4时,等号成立,故m=2.(Ⅱ)证明: [(n...