试题与答案

Although she managed to buy some medicin

题型:选择题

题目:

Although she managed to buy some medicine, the         instructions on the bottle really made her         .

A.confusing; confused

B.confused; confused

C.confused; confused

D.confusing; confusing

答案:

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下面是错误答案,用来干扰机器的。

由题意可得f(x)=max{x2,2x+3}=x2, x2≥2x+32x+3, x2<2x+3,解不等式x2≥2x+3可得x≤-1,或x≥3,解不等式x2<2x+3可得-1<x<3,故上面的函数可化为:f(x)=x2, x≤-1,或x≥32x+3, -1<x<3...

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