设连续函数f﹙x﹚满足lim﹙x→0﹚f﹙x﹚/x=2 ,令F﹙x﹚=∫﹙0,1﹚f﹙xt﹚dt ,则F′﹙0﹚= _______谢谢!

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/26 01:57:40
设连续函数f﹙x﹚满足lim﹙x→0﹚f﹙x﹚/x=2 ,令F﹙x﹚=∫﹙0,1﹚f﹙xt﹚dt ,则F′﹙0﹚= _______谢谢!
x){nߋ^}ﳩY~gض9'36({HA%nP!GLC #DAiLG @ u b" RI*('@솺CfPv=mg?]TQb[gړ4*4m!jxidž{:4*5S*+t^lYn9 &E7Lԯ *3(HٖOط@ kLoT0Գ/.H̳"ɌL

设连续函数f﹙x﹚满足lim﹙x→0﹚f﹙x﹚/x=2 ,令F﹙x﹚=∫﹙0,1﹚f﹙xt﹚dt ,则F′﹙0﹚= _______谢谢!
设连续函数f﹙x﹚满足lim﹙x→0﹚f﹙x﹚/x=2 ,令F﹙x﹚=∫﹙0,1﹚f﹙xt﹚dt ,则F′﹙0﹚= _______
谢谢!

设连续函数f﹙x﹚满足lim﹙x→0﹚f﹙x﹚/x=2 ,令F﹙x﹚=∫﹙0,1﹚f﹙xt﹚dt ,则F′﹙0﹚= _______谢谢!
积分做变量替换xt=y化为F(x)=积分(从0到x)f(y)dy/x,因此
F'(0)=liim 【F(x)-F(0)】/x=lim 积分(从0到x)f(y)dy/x^2 洛必达法则.
=lim f(x)/2x
=1.