Question

y=x^2-1/x(x-1),当X趋向于什么时,为无穷大量,四个选项是x趋向-1,1,0,正无穷

Answer 1

y=(x^2-1)/x(x-1)=(x+1)(x-1)/x(x-1)=(x+1)/x

所以,当x→0时是无穷大量