Question

Use continuity to evaluate the limit.
lim
x→9 40 + sqrt(x) / sqrt(40 + x)

Answer 1

just let x = 9

Answer 2

replace \(x\) by \(9\) and see what you get

Answer 3

first thing to try when you get a limit is to simply plug that value in for x, if the answer makes sense then that is the limit

Answer 4

in other words, if f(a) is defined at a then lim as x goes to a is f(a)