已知函数
f(x)=ln−f′(1)x(I)求f′(1);
(II)求f (x)的单调区间和极值,
(皿)设a≥1,函数g(x)=x
2-3ax+2a
2-5,若对于任意x
0∈(0,1),总存在x
1∈(0,2),使得f(x
1)=g(x
0)成立,求a的取值范围.
人气:147 ℃ 时间:2019-08-21 01:17:40
解答
(I)∵f(x)=lnex2-f′(1)x,∴f′(x)=2ex×e2-f′(1),令x=1,可得f′(1)=1-f′(1),解得f′(1)=12;(II)由(I)知:f′(x)=1x-12=2−x2x,∵x>0,∴当0<x<2时,f′(x)>0,当x>2时,f′(...
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