提问有这样一道题:已知函数f(x)=x2-2|x|-|lg(x+2)|,求f(x)的零点个数.我知道这道题是通过作出函数图象求解的,但是函数中包含了两个绝对值,这样的图象我不太会画.回答对于含绝对值的函数问题,正确作出函数图象,是利用图象法解题的关键.同学们一般会通过分类讨论去掉绝对值符号,将其转化为分段函数,分别作出每个区间上的函数图象,从而获得整个函数的图象.但是提问中的这道题如果通过分类 The question has the following question: We know that the function f (x) = x2-2 | x | - | lg (x + 2) | As the solution, but the function contains two absolute values, such an image I will not draw. Answer For the absolute value of the function, the correct function of the image is the key to solving problems using the image method. We usually through the classification discussion to remove the absolute value of the symbol, it will be transformed into a piecewise function, respectively, to make a function of each interval image, so as to obtain the image of the entire function.But the question in this question if the classification