a)
g(x)+h(x)=0
g(x) even h(x) odd
g is both even and odd
g(x)=g(-x)=-g(x)
b)
f(x)=f$_{e}$(x)+f$_{0}$(x)
f(-x)=f$_{e}$(-x)+f$_{0}$(-x)=f$_{e}$(x)-f$_{0}$(x)
solve for f$_{e}$(x) and f$_{0}$(x)
f$_{e}$(x)= (f(x)+f(-x))/2
f$_{0}$(x)= (f(x)-f(-x))/2
