关于高次多项式函数的图像问题
High-degree polynomial function:
If n (the highest exponent)is odd,and An＞0,the graph falls to the left and rises to the right.
If n is odd,and An＜0,the graph rises to the left and falls to the right.
If n is even,and An ＞0,the graph rises to the left and right
If n is even,and An＜0,the graph falls to the left and right
An 是最高次项的系数
这里该怎么理解?