12-13高三上·黑龙江哈尔滨·期末
1 . 已知函数
时,
只有一个实根;当k∈(0,4)时,
只有3个相异实根,现
给出下列4个命题: ①
和
有一个相同的实根;
②
有一个相同的实根;
③
的任一实根大于
的任一实根;
④
的任一实根小于
任一实根.
其中正确命题的序号是
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/7465f743b99644388135b4d980951fd5.png?resizew=426)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/aa2ac6868a4d4dd5b94663109822daea.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/aa2ac6868a4d4dd5b94663109822daea.png?resizew=84)
给出下列4个命题: ①
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/d9d73249330b4b2fbd4e1a97cd6805a5.png?resizew=81)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/4556d3ff6cde486fae24cd2ee9a476ba.png?resizew=63)
②
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/d8772f9918ed487d8e82acf4a369c984.png?resizew=134)
③
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/5d8a686eb24a4cc7a57df1980c7d2dbd.png?resizew=80)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/0e9697752781415d90f5fcf4ec084b54.png?resizew=76)
④
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/d7f7771d1baf436f9212d779f70e359e.png?resizew=81)
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/751442571ce64acba23c13ec2c800b37.png?resizew=81)
其中正确命题的序号是
![](https://img.xkw.com/dksih/QBM/2012/2/6/1570718760869888/1570718766260224/STEM/eedf7a815c9a4966abbfdae2cf9fcd3b.png?resizew=129)
您最近一年使用:0次