一、对数型复合函数单调区间的求解三部曲(1)确定定义域;(2)弄清复合函数是由哪些基本初等函数复合而成,将复合函数分解成基本初等函数y=f(u),与u=g(x),并分别确定两个函数的单调区间;(3)若这两个函数同增或同减,则y=f(g(x))为增函数,若一增一减,则y= First, the logarithmic complex function monotonic interval solution Trilogy (1) to determine the domain; (2) to find out what the complex basic function composite elementary functions, the composite function is decomposed into basic elementary functions y = f ( u), and u = g (x), respectively, and determine the monotonous intervals of the two functions respectively. (3) If both of these two functions increase or decrease in the same way, then y = f One plus one minus, then y =