how do i evaluated these limits:

lim x --> 3 ((square root of x^2 +16)- 5)/(x^2 - 3x)

lim x--> to infinity (2+ 100/x)

for the first question, use ur GC (graphic calculator), u can see frm the table function that answer is 0.2

for the 2nd one, it is to say 2+lim(100/x)=2