Question

lim x->16 4- sqrt(x) / x-16

Answer 1

In google type:

wolfram alpha

When you see list of results click on:
Wolfram Alpha:Computational Knowledge Engine

When page be open in rectangle type:

lim 4-sqrt(x)/x-16 as x->16

and click option =

After few seconds you wil see result.
Then click option:Show steps