Question

lim is 4.√ 7x-2

Answer 1

you means lim as x approaches 4?

Answer 2

Yeah i think so

Answer 3

\[\lim_{x \rightarrow 4} \sqrt{7x-2}\]
is that how the problem looks like?

Answer 4

if the problem is as written by @lgbasallote , then just do a direct substitution....