The function f is continuous on the intervals [1,3] and (3,5].Is the function continuous on the interval [1,5]?Illustrate why or why not?
中文是 方程f分别在区间[1,3]和(3,5]连续.那么方程在区间[1,5]上连续吗?请说明为什么连续?或是为什么不连续?