# Math Help - Infinite limits

1. ## Infinite limits

Find if the limit is +ve infinity or -ve infinity
1) $lim (x \rightarrow 0^-)\frac{\sqrt{x^2+3}}{x}$

2) $lim (x \rightarrow 0^+)\frac{1}{x}-\frac{1}{x^2}$

Attempt:
1) $-\infty$
2) $+\infty$

Am I correct?

2. Originally Posted by mj.alawami
Find if the limit is +ve infinity or -ve infinity
1) $lim (x \rightarrow 0^-)\frac{\sqrt{x^2+3}}{x}$

2) $lim (x \rightarrow 0^+)\frac{1}{x}-\frac{1}{x^2}$

Attempt:
1) $-\infty$
2) $+\infty$

Am I correct?
Tell us why you think these are the limits, that way we can diagnose what it is about these problems that you don't understand (at least one is wrong).

CB

3. Originally Posted by CaptainBlack
Tell us why you think these are the limits, that way we can diagnose what it is about these problems that you don't understand (at least one is wrong).

CB
Which is wrong

4. Originally Posted by mj.alawami
Which is wrong
Are you just 'fishing' for someone to give the correct answer?
Did you graph the functions?
The graph tell you the answer.
If you do not have a graphing utility then:
go to this website Wolfram|Alpha
In the input window, type in this exact expression: plot (1/x)-(1/x^2) (you can copy & paste)
[b]Click the equals bar at the right-hand end of the input window.