常见幂函数定义域、值域、性质、图形?

问题描述:

常见幂函数定义域、值域、性质、图形?

定义域      值域       奇偶性            单调性               公共点 
y=x           R                   R                   奇              (-∞,+∞)增          (1,1)
y=x^2        R                [0,+∞)      偶              (-∞,0)减,(0,+∞)增    (1,1)
y=x^3        R                    R                   奇            (-∞,+∞)增          (1,1)
y=x^0.5    [0,+∞)增      [0,+∞)           非奇非偶         [0,+∞)增        (1,1)
y=x^(-1)    {x|x≠0}           {y|y≠0}           奇          (-∞,0)减,(0,+∞)减      (1,1)