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December 17, 2014

December 17, 2014

Posted by **Anna** on Sunday, September 12, 2010 at 12:34pm.

The limit of (sqrt(x+1)-2)/(x-3) as x tends to 3.

The limit of (sqrt(x+5)-sqrt(5))/x as x tends to 0

- calculus -
**bobpursley**, Sunday, September 12, 2010 at 12:51pmrationalize the numerator: I will do the first.

Numerator: (sqrt(x+1)-2)(sqrt(x+1)+2_

x+2-4=x-2 as x>3, it approaches 1

Denominator: ((x-3)(sqrt(x+1)+2)

xsqrt(x+1)+2x-3sqrt(x+1)-6

as x>3

3sqrt4+6-3sqrt(4)-6

6+6-6-6 still zero.

so you have as the limit 1/0, it does not exist.

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