Question

What is the domain and range of the function f(x)=5/x?

Answer 1

f(x) is not defined when x = 0! So domain is R - {0}!

And for finding range, first find inverse of function and then find the domain!

So f'(x) = 5/x

So as domain of this inverse function is R - {0}!

Range of original function is R - {0}!