Why do you think it is important to know how to combine functions. In other words, be able to manipulate (add, subtract, multiply, divide) two or more functions.
- 9 年前最愛解答
In most of the times, functions contains more than 1 variables. If there is more than 1 variable in 1 function, then you can't resolve it unlesss there is other function(s) contains the variables so that the number of functions are more than the number of variables.
Then you have to combine the functions to resolve the value of the variables.