Question

Show that sum of two even function with the same domain is an even function.

Answer 1

f(x) = f(-x)
g(x) = g(-x)

h(x) = f(x) + g(x)
h(-x) = f(-x)+g(-x) = f(x)+g(x)
so
h(-x)=h(x)

Answer 2

Thanks!!