Help you summarize one of the most commonly used methods (but it is not guaranteed to be the simplest, and the calculation may be more complicated. It is not recommended to be the last resort when making multiple-choice questions): First, see if the three formulas given are similar in format (that is, they are all exponential or exponential, logarithmic sine and cosine functions, etc.). ). If so, then the constructor F(x)= the given structural similarity. Judge its monotonicity (using difference or derivative) and then judge the size of the whole function according to the size of internal x (generally another function form) combined with monotonicity. If the given two formulas have different sub-formats, we can only use the difference to make F(x)= (the difference between the two functions), take the derivative, judge monotonicity, find out the zero point and judge the size relationship of the given function.