Function (Domain and Range)
s alam Pre Cal~ Domain Range eh. ? many student find out that tis subtopic realy kill their nerve. however, i found that there are just a few 'thing' from all serabut thing that you must take a good remind of if you want to rekill tis subtopic 1) Graph of function -reciprocal function -square root function 2) in a root of a square , the root must be in the positive number (unless the question want it to be a complex number) we cannot square root of -1 , can we. ? unless it will be = i 3) any divisor cannot equal to 0 4) to find a range of a function we MUST inverse it now, we will go to the realy 'easy' part, remembering/understanding the concept of the function. now i will show u, why the 4 main points i mentioned above2 are the important thing that you must to understand.. see the picture below and look for the reciprocal function and square root function 1stly, we will go through the Reciprocal Function and now we will see what happen to the domain and rang...
