高中数学代数与函数一函数练习题43
题目内容

已知函数 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image072.gif是定义在 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image073.gif上的奇函数,当 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image074.gif时, http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image075.gif.给出以下命题: http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image076.gif①当 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image077.gif时, http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image078.gif;       ②函数 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image072.gif有3个零点; ③ http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image079.gif的解集为 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image080.gif;   ④ http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image081.gif,都有 http://picflow.koolearn.com/upload/2010-12/27/84585f89-df02-427d-b81c-b37c8421f956/paper.files/image082.gif. 其中正确命题的个数是(    )

2021-07-26

A.1

B.2

C.3

D.4

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