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[函数] 2021年新高考全国卷1第7题 凸函数的切线两条

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isee Posted 2021-6-9 21:22 |Read mode
Last edited by isee 2021-7-21 21:44单选题有8个,这是第7题,如果仅从图形上分析,点`(a,b)`在 x 轴上方,曲线下方即可,D

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7. 若过点\(\left( a,b \right)\)可以作曲线\(y={{\text{e}}^{x}}\)的两条切线,则(    )

A. $\text{e}^b<a$                B. $\text{e}^a<b$

C. $0<a<\text{e}^b$        D. $0<b<\text{e}^a$
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