Question

设f(x)、g(x)都是定义在（-∞,+∞）上的函数,并且满足f(x)+2g(-x)=x3+x2.则f(-2)+2g(2

Answer 1

f(-2)+2g(2)=f(-2)+2g(-(-2))=(-2)^3+(-2)^2=-4