It means that the value of the function at any point "x" is the same as the value of the function at the negative of "x". The graph of the function is thus symmetrical around the y-axis. Examples of such functions are the absolute value, the cosine function, and the function defined by y = x2.
It means the value of the function equals zero when the argument is 4. For example: f(x)=x-4 f(4)=4-4=0
True
Only if it's a function.
yes, it is.
no
exactly...
It is 1.2164
y = x This is a line and a function. Function values are y values.
It means the value of the function equals zero when the argument is 4. For example: f(x)=x-4 f(4)=4-4=0
If you plug in y for the x function, and it equals the answer you got, it is right.
True
Only if it's a function.
yes, it is.
no
Yes.
f(f(x)) = f(x). Only if f is 1-1 then we have a solution f(x)=x.
All of them