Question

Hey can you tell me how to find a domain of a function and what does real numbers mean

Answer 1

Basically the domain represent all the possible values that the function can assume on the x axis

And the real numbers represent all the possible numbers from - infinity to infinity

For example:

f(x)= 2x+1

The domain is all the real numbers since the function is defined for all the possible values of x

In the other hand:

`g(x)=(1)/(x-1)`

For this new function the domain is all the real numbers except x=1 since we can' divide by 0