Question

函数f(x)=ax3+bx2+cx满足f(1)=1,a>b>c,求c/a的取值范围.紧急.

Answer 1

由f(1)=1得：b=a+c-1;

又由a>b>c得：a>a+c-1,a+c-1>c,a>c;

有:c