x|√x2-1 2 f(x)=maxx, x, 0<x<2 x0<x<1 f(x)={1x=1 x21<x<2 故当0<x<⑩∫(x)=1 当1<x<2时∫'(x)=2x2 2 1 1 1 1 x x y 2 2 1 1 | | x x x | | 1 1 2 x x ② ( ) max{ , } ,0 2 2 f x x x x 1 2 1 1 0 1 ( ) 2 x x x x x f x 故 当0 x 1时 f (x) 1 当1 x 2时 f (x) 2x