Question

#define N 5 #define f(M) ((N+1)*M) 求x=2*(N+1)+2*f(N+1); 求x的值

Answer 1

2*6+2*（（N+1）*N+1）=2*6+2*31=74

注意不是2*6+2*（（N+1）*（N+1））!