+x2+ 4 0≤x≤1 ex +1 在x=0处 F)=F=FO=-子 x->0 x->0 F(x)在[-1,1]连续 在x = 0处 - 0 0 1 lim ( ) lim ( ) (0) x x 4 F x F x F → → + = = = − F x( )在[-1,1]连续 1 1 1 3 2 , 1 0 2 4 4 ( ) 1 1 , 0 1 4 1 x x x x x F x x e  + + − −    =   −    +