问题标题:
【问几道高二数学、英语题1、设函数f(x)=-x^2+2ex^2-mx+lnx,若方程f(x)=x有解,则实数m的最小值是多少?(要过程)2、Heworkshardathislessonsinordertocatchupwithothers.=Heworkshardathislessons()(】
问题描述:
问几道高二数学、英语题
1、设函数f(x)=-x^2+2ex^2-mx+lnx,若方程f(x)=x有解,则实数m的最小值是多少?(要过程)
2、Heworkshardathislessonsinordertocatchupwithothers.
=Heworkshardathislessons()()()()catchingupwiithothers.
=Hehascaughtupwithothers()()()()hishardworking.
3、Nowwewillhaveadiscussionfreely.=Nowwewill()()()fordiscussion.
4、Thankyouforyourtimelyhelp.=I()yourtimelyhelp.=()foryourtimelyhelp.
5、Myroomistwicelargerthanhis.=Myroomis()()()larger()his
=Myroomisthreetimes()()()his.
黄国健回答:
1.由f(x)=x得:x^2+2ex^2-(m+1)x+lnx=0有解,设g(x)=x^2+2ex^2-(m+1)x+lnx(x>0)对g(x)求导得:g'(x)=2(2e+1)x+1/x-(m+1)则对g'(x)=0对x>0恒有解,即:2(2e+1)x^2-(m+1)x+1=0对x>0恒成立,所以可得:(m+1)^2-4*2(2e...
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