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Calculate the Limit

  • #1
3,003
2
I don't know why I am stuck on this one?

[tex]\lim_{x\rightarrow 9}\frac{\sqrt{x}-3}{x-9}[/tex]

I tried multiplying by the conjugate of both the Numerator, and then the denominator. Is there another 'trick' like that?
 

Answers and Replies

  • #2
216
1
Do a little substitution. What if x=t2 ? :smile:
 
  • #3
9
0
Try using the x2 - y2 = (x + y)(x - y) pattern on the denominator first.
 
  • #4
3,003
2
doh.gif


Thanks!
 
Last edited by a moderator:

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