函数的零点问题是新课标的新内容,考查形式多种多样,其中有一类问题是所证明的不等式中仅仅涉及零点,以下我们称为“零点不等式”.下面就此类问题我们尝试寻找一种解题思路,归纳解题方法,以提高我们的解题能力.例1已知函数f(x)=ln(x+1/a)-ax,其a中a∈R且a≠0.(1)讨论f(x)的单调区间; The zero problem of the function is the new content of the new curriculum standard. There are many kinds of examinations in the new curriculum standard. One of the problems is that there are only zero points in the proved inequalities. In the following we will call “zero point inequality” In this way, we can solve the problem solving problem and solve the problem so as to improve our ability to solve problems.Example 1 It is known that the function f (x) = ln (x + 1 / a) -ax where a ∈ R and a ≠ 0. (1) discuss the monotonous interval of f (x);