名校
解题方法
1 . 给出下列命题,其中真命题为( )
① 用数学归纳法证明不等式
时,当
时,不等式左边应在
的基础上加上
;② 若命题p:
,则
;③ 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146102e72820b19c86e20610a6881b2d.png)
① 用数学归纳法证明不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b166b677d5b865425d0e14321ac23576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01357b49b24ead302beb3d57c2fe7626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c65cdccb8e42c10b6e67825641100a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342c18c32995d372c739d3565fabae75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6c7e405ab871a91846727978145cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa4f0329d07f6fbb4f0ca466a33a04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d016344831f932253886a620e7015aca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146102e72820b19c86e20610a6881b2d.png)
A.①② | B.① | C.② | D.②③ |
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