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在课堂上,就学生提出的分式型函数f(x)=(x+a)/(x+a+1)+(x+a+1)/(x+a+2)+(x+a+2)/(x+a+3)的图象的对称中心是什么?引导并认真地与同学们一道共同探究此问题,且探究成功.
In class, the students’ proposed fractional function f (x) = (x + a) / (x + a + 1) + (x + a + 1) / (x + a + 2) + (x + a + 2) / (x + a + 3) What is the center of symmetry of the image? Lead and conscientiously explore this issue with your classmates and explore success.