Domain and Range of a function? What is it? How do I find it?: Dr Chris Tisdell Live Stream

What is the domain and range of a function? Why is it useful and how do I calculate it? I will answer these questions in this video.
In mathematics, functions are an important tool for understanding how things depend on one another. To make sure our functions are well-defined for our inputs, it is useful to know the domain. To understand what kinds of outputs our function gives us, it is useful to know the range.

[monoman]

nice speed and good explanation level. looking forward to rest of series. thanks...

[my-crazy-fantastic-fanatic]

Is it weird that I automatically started waving back?
These are great lessons, btw. I really appreciate you posting them!

[tedestuye]

Sir, what if the given is negative square root? The domain is still (–3, infinity)?