The famous Dirichlet function is defined like this What are the independent variables and the dependent variables of this function What are the definition and value ranges of this function Please write the function values when x = - 1, root 2, 6.4 and 3.1415 respectively

The famous Dirichlet function is defined like this What are the independent variables and the dependent variables of this function What are the definition and value ranges of this function Please write the function values when x = - 1, root 2, 6.4 and 3.1415 respectively

1、
The independent variable is x and the dependent variable is y
2、
The domain is r
The range is {1,0}
3、
x=-1,y=1
X = radical 2, y = 0
x=6.4,y=1
x=3.1415,y=1