Question

Evaluate the limit as x goes to 4 from the right side: Attached with radical in numerator: I am uncertain understanding this one:

Answer 1

denominator is 4, numerator is 0 so get 0/4 = o

Answer 2

the reason it is from the right is that
\[\sqrt{x-4}\] is not defined if x < 4

Answer 3

so you have to take the limit from the right. from the left it is not defined

Answer 4

oh I see because you'll have a negative in the radical which is undefined -thanks for that explanation, it really helped!