The interval of a real root of equation x ^ 3-x-1 = 0 is

The interval of a real root of equation x ^ 3-x-1 = 0 is

X ^ 3 = x + 1 drawing method to draw straight line Y1 = x ^ 3 and y2 = x + 1, easy to know, intersection x > 0
When x = 1, Y1 = 1, y2 = 2, that is, y1y2
∴1