(1)
求导数:f片x=-2(x-1)+2(a-1)/(x+1)
当x=0时,f片x=-2(0-1)+2(a-1)/(0+1)=2a
可知此时的2a即为切线方程y=4x-1的斜率:2a=4
a=2
(2)f片x=-2(x-1)+2(a-1)/(x+1)
=【-2(x-1)*(x+1)+2(a-1)】/(x+1)
=2(a-x²)/(x+1)
又f(x)的定义域:x+1>0,x>-1
如果,a
(1)
求导数:f片x=-2(x-1)+2(a-1)/(x+1)
当x=0时,f片x=-2(0-1)+2(a-1)/(0+1)=2a
可知此时的2a即为切线方程y=4x-1的斜率:2a=4
a=2
(2)f片x=-2(x-1)+2(a-1)/(x+1)
=【-2(x-1)*(x+1)+2(a-1)】/(x+1)
=2(a-x²)/(x+1)
又f(x)的定义域:x+1>0,x>-1
如果,a