Question

编写程序,用梯形法求一元函数f(x)=x^3+2x^2-12x-6（其中^表示幂运算）,在区间[1,5]上的积分近似值S

Answer 1

# include

# include

# define N 20

int main(void)

{

double d,t,x,s=0;

d=4.0/N;

for(x=1; x