Domain and Range?!Watch
So I'm doing Edexcel A2 Maths, and we are doing functions at the minute, but I just cannot understand the range and domain! Where do they come from and what are they for?! I was hoping someone could explain to me what they are in relatively simple terms.
However for f(x)= 1/x remember that x cannot equal 0, the range is all real numbers except 0. Because can you ever divide a non zero number and get 0. The answer is no.
So in summary, the domain is all the values that you can put into the function, and the range is all the values that you get coming out of the function.
If you're not sure just think domain is input values and range is output values - there is slightly more to it but I have simplified it a bit