Chrome，
QQ浏览器
.
![[基础]高中数学必修第一册 3.2函数的基本性质](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F4d342c74695f23c0ab7b6aa50357170fb3181548.jpg%40672w_378h_1c_%21web-search-common-cover)
![[基础]高中数学必修第一册 3.1函数的概念及其表示](http://imgshow.1ydt.com/img?url=%2F%2Fi0.hdslb.com%2Fbfs%2Farchive%2F47c7647764f7378f28ea97c7cb801dfa4e9510c2.jpg%40672w_378h_1c_%21web-search-common-cover)
.