Posted by rudy on .
i am having trouble iwth the following math problem:
lim
x>oo x/squre root 4+xsquare
I am not sure if i multiple the denominator with the numerator?

math 
drwls,
The answer depends upon whether the x^2 is in the denominator, and whether you mean sqrt 4 + x^2 or sqrt (4 + x^2). You need to use parentheses to clarify the meaning.
If you mean x/[sqrt (4 + x^2)]
Then limit as x> infinity = 1, because the 4 becomes negligible compared to x^2
If x^2 is a separate term, then the limit is infinity