1, the strategy to solve the problem of constant establishment is the preferred method of parameter separation (abbreviated as: separating parameters).

2. If there is still an uncertain structure (generally called transcendental structure) in the derivative function after the first derivative of the function is obtained, it is necessary to continue to use the derivative tool to study it, so it is necessary to study its properties and zeros as a new function. This method is called second derivative.

3. If a function has a zero point in an interval (this zero point has been determined by the existence theorem of zero point), but this zero point cannot be found, we call it the hidden zero point of this function. This hidden zero structure should boldly simplify the final minimum value, which is called hidden zero substitution.