limit question

**kingsolomonsgrave** · December 9th 2012, 12:54 PM

how would you tackle this question?

**Plato** · December 9th 2012, 01:02 PM

Originally Posted by kingsolomonsgrave

how would you tackle this question?

$\sqrt{x^2+1}-{x}=\frac{1}{\sqrt{x^2+1}+{x}}$ .

**kingsolomonsgrave** · December 9th 2012, 01:10 PM

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

**Plato** · December 9th 2012, 01:18 PM

Originally Posted by kingsolomonsgrave

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

No. The answer is 0.

Thread: limit question