Some problems in senior one mathematics are completely unclear about the concept of compound function. The problems that the teacher asked us to do were not taught, and now we will always understand some problems wrong. Because the definition range of f(x) is from 0 to negative infinity, it can be listed that x is greater than 0 2x-3 is greater than 0, and it can be solved that x is greater than 3/2.

The subtraction function is listed in the definition domain, so x is greater than 2x-3 and x is less than 3. To sum up, you can get your final answer.

In fact, the key to the complex function problem is whether you can master the skills. Here is a formula, which means, for example, the compound function m(x)=g(f(x)). If we know the monotonicity of g(x) and f(x) in the domain of definition, we can use the formula to get the composite function m(x). Most monotone compound functions are from this point of view, especially those composed of quadratic function, exponential function and logarithmic function in the later period. It is very important to understand that the problems of real domain, value domain and monotonicity can be basically solved, and it is also important to note that the domain of g(x) is equivalent to the domain of f(x).

I wish the landlord success in his study ~