Given the function with the domain , and , then the number of zeros of the function in the interval is \_\_\_\_\_\_.
Solution
Let the function , which leads to the equation ,
- When , the function first increases and then decreases, reaching its maximum value of 1 at ,
and also has at ;
- When , , and at , the function reaches its maximum value ,
and also has at ;
- When , , and at , the function reaches its maximum value ,
and also has at ;
- ...;
- When , , and at , the function reaches its maximum value ,
and also has at .
Therefore, the number of zeros of the function in the interval is .
By setting the function , we obtain the equation , thereby transforming the problem of finding the zeros of the function into finding the roots of the equation, which is further transformed into a problem of finding the intersection points of two functions, and then the answer is obtained by discussing each interval separately.
This problem examines the relationship between the zeros of a function and the roots of an equation, as well as the application of the intersection points of functions, reflecting the mathematical transformation thought method and the mathematical thought method of classified discussion, making it a challenging problem.