含参数的方程与不等式的问题中,由于参数的存在与可变,增加了其“不确定性”与复杂性,很多这类问题的解决,如果仅从“数”的角度考虑往往需要进行复杂的分类．然而用数形结合的方法,则思路比较清晰、简洁,而且往往给我们一种耳目一新的感觉．下面举例说明如何用数形结合法解决含参数的方程和不等式的有关问题． In the problem of equations and inequalities with parameters, due to the existence and variation of the parameters, the “uncertainty” and complexity are increased, and the solution to many of these problems is often complicated if only from the “number” point of view. Classification. However, using the method of combination of numbers and shapes, the ideas are clear and concise, and often give us a fresh feeling. The following is an example of how to solve the problems related to equations and inequalities with parameters using the method of number and shape combination.