losconsoladores noe milk sicilia sexy portuguese ebony slut rough swinger fourway fucking

已知函数f(x)=lnx+ax平方一x.(1)若f(x)在其定义域内是增函数,求实数a的取值范围.(2)若函数g(x)=

已知函数f(x)=lnx+ax平方一x.(1)若f(x)在其定义域内是增函数,求实数a的取值范围.(2)若函数g(x)=ax平方一ax,且f(x)≤g(x),求实数a的取值范围
我心如小提琴 1年前 悬赏5滴雨露 已收到1个回答 我来回答 举报

船人 幼苗

共回答了21个问题采纳率:81% 向TA提问 举报

(1)f(x)=lnx+ax^2-x,x>0,
f'(x)=1/x+2ax-1,
f(x)在其定义域内是增函数,
f'(x)>=0恒成立,
a>=(x-1)/(2x^2),记为h(x),x>0,
h'(x)=1/(2x^2)-(x-1)/x^3=(2-x)/(2x^3),
0

1年前

3
可能相似的问题
Copyright © 2021 photoscopeapp.com - 雨露学习互助 - 16 q. 0.020 s. - webmaster@yulucn.com
vrallure busty ebony beauty daizy cooper plays with her sex toys in virtual reality loan4k needing a loan makes the businesswoman hook up with a man certain men like to enjoy shaved pussies it gives them better visibility and juicier hole clea desires of submission full movie softcore with clea gaultier claire castel mariska kristof cale philippe soine daddy4k papa intelligent ne perd pas sa chance davoir des relations sexuelles avec ses fils nouvelle copine