Question

不等式x分之一大于等于x的解集是.

Answer 1

x分之1≥x
x-x分之1≤0
(x平方-1)/x≤0
(x+1)(x-1)/x≤0
即
(x+1)x(x-1)≤0,但x≠0
所以
x≤-1或0