We can divide the first quadrant into six regions with y=x, y= 1 and x= 1, and then number them separately. We call the area surrounded by y = x, y = 1 and Y axis the first area, and counterclockwise we call it two, three, four, five and six areas respectively, so that we can, for example, (1) y = x (3/2) by a > 1 Know that the function passes through two or five regions in the first quadrant, the definition domain of the function is [0, +∞), and the function only has the image of the first quadrant. (2) y = x (2/3), from 0