設(shè)函數(shù).則在時(shí), 查看更多

 

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設(shè)函數(shù),則下列命題中正確命題的序號(hào)有__________.

①當(dāng)時(shí),函數(shù)在R上是單調(diào)增函數(shù);

②當(dāng)時(shí),函數(shù)在R上有最小值;

③函數(shù)的圖象關(guān)于點(diǎn)(0,c)對(duì)稱;

④方程可能有三個(gè)實(shí)數(shù)根.

 

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設(shè)函數(shù),則下列命題中正確命題的序號(hào)有__________.
①當(dāng)時(shí),函數(shù)在R上是單調(diào)增函數(shù);
②當(dāng)時(shí),函數(shù)在R上有最小值;
③函數(shù)的圖象關(guān)于點(diǎn)(0,c)對(duì)稱;
④方程可能有三個(gè)實(shí)數(shù)根.

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設(shè)函數(shù),則下列命題中正確命題的序號(hào)有         

①當(dāng)時(shí),函數(shù)在R上是單調(diào)增函數(shù);

②當(dāng)時(shí),函數(shù)在R上有最小值;

③函數(shù)的圖象關(guān)于點(diǎn)(0,c)對(duì)稱;

④方程可能有三個(gè)實(shí)數(shù)根.

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設(shè)函數(shù),則下列命題中正確命題的序號(hào)有       . (請(qǐng)將你認(rèn)為正確命題的序號(hào)都填上)
① 當(dāng)時(shí),函數(shù)R上是單調(diào)增函數(shù);
②  ②當(dāng)時(shí),函數(shù)R上有最小值;
③ 函數(shù)的圖象關(guān)于點(diǎn)對(duì)稱;        
④  ④方程可能有三個(gè)實(shí)數(shù)根.

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設(shè)函數(shù),它們的圖象在軸上的公共點(diǎn)處有公切線,則當(dāng)時(shí),的大小關(guān)系是                                               (   )

(A)(B)(C)(D)的大小不確定

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