题目内容
定义在R上的函数f(x)满足f(4)=1,f"(x)为f(x)的导函数,已知函数y=f"(x)的图象如图所示,若两正数a,b满足f(2a+b)<1,则
的取值范围是
2021-07-06
A.
B.(-∞,
)∪(3,+∞)
C.
D.(-∞,-3)
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