# limit question

• Dec 9th 2012, 01:54 PM
kingsolomonsgrave
limit question
Attachment 26158

how would you tackle this question?
• Dec 9th 2012, 02:02 PM
Plato
Re: limit question
Quote:

Originally Posted by kingsolomonsgrave
Attachment 26158
how would you tackle this question?

$\sqrt{x^2+1}-{x}=\frac{1}{\sqrt{x^2+1}+{x}}$.
• Dec 9th 2012, 02:10 PM
kingsolomonsgrave
Re: limit question
I see, so first rationalize the expression and then divide by the highest power in the denominator giving $\frac{1}{2}$
• Dec 9th 2012, 02:18 PM
Plato
Re: limit question
Quote:

Originally Posted by kingsolomonsgrave
I see, so first rationalize the expression and then divide by the highest power in the denominator giving $\frac{1}{2}$