Question

How do I test for symmetry?
2^x2/x^2+1?
Is there a formula I would use?

Answer 1

\[\frac{2^{x^2}}{x^2+1}\]

is that what you wrote?

Answer 2

for reflectional symmetry change the x to a (-x) in your expresson then simplify. If you get the same original expression, you have reflectional symmetry about the y-axis.

If you get the exact expression, but opposite, you have symmetry about the origin (180 degree rotational symmetry)