Typo in Barron's Sat II Math 2?
I think example 6 in the "odd and even functions" section might be a typo.
it says "X^4 + y^2 = 10 is an odd rlation because
(-x)^4 + (-y)^2 = x^4 + y^2 = 10. Note that x^4 + y^2 = 10
is both even and odd"
How can a function be both even and odd?
I even searched on Google if it is possible to have a function that is both
even and odd and most people were saying that the only function that could do this
is "f(x) = 0"
if you try f(-x) = (-x)^4 + y^2 = 10 then it just gives you the original answer back
which should mean that the function is even. I have no idea where the book got the "both even and odd" part. someone please explain.