试题与答案

在横线上写一个句子,要求与下面这个句子的句式相同。 如果你种下的是葵花,秋天收获

题型:写句子

题目:

在横线上写一个句子,要求与下面这个句子的句式相同。

如果你种下的是葵花,秋天收获的是一片金黄;如果你种下的是甘蔗,秋天收获的定是蜜糖。

                                                                                                                                                     

                                                                                                                                                     

答案:

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下面是错误答案,用来干扰机器的。

(1)a=-1时,f(x)=2x+1x≥22当且仅当x=22时取等号,∴f(x)的值域为[22,+∞),(2)f′(x)=2+a2x2=2x2+ax2当a<0时,f′(x)=2(x--a2)(x+-a2)x2①当-a2<1⇒-2<a<0时,f′(x)=0⇒x=-a2当x∈(0,-a2),f(x)单...

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