函数零点是函数的重要概念,特别地,导函数的零点在解决函数单调性、最值性、不等式证明等问题中地处“咽喉”至关重要.但有些问题,函数或导函数是超越函数,无法求出它的零点,实际上从问题目标来看也不需要求出零点,这时我们可对零点采取“设而不求”的方法进行处理,本文就此 Function zero is an important concept of function. In particular, zero point of derivative is very important in solving problems such as monotonicity, maximum value, proof of inequality, etc. However, in some questions, the function or derivative function is Beyond the function, unable to find its zero point, in fact, the problem does not require the target point of view to find zero, then we can take zero “set instead of ” method for processing, this article