Travelers flying across time zones often find themselves exhausted because human bodies can’t ma e an immediate ( )to new time schedules. 选项
【考查知识点:极值最值综合】
满足方程f '(x)=0的点一定是函数y=f(x)的( ).
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
设f (x)=,则f (f (x))=( ).
若函数f (x)是定义在(-l, l)(l>0)上的函数,则有
⑴f (x)+f (-x)是偶函数; ( )
若函数f (x)是定义在(-l, l)(l>0)上的函数,则有
⑵f (x)-f (-x)是奇函数. ( )
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