Hello Everyone! Have here some questions from my maths exercise

Question 1:

lim

x->0 4

It states the limit x approaching 0 however the function f(x) = 4, a single digit!

I have no idea how to do this one..

Second question:

lim f(x)

x-> 3

f(x) = { 2x^2 - 1, x less than or equal to, 3

{ 3x^2 - (30/x), x> 3

How do I do this?