anonymous
  • anonymous
Help (Evaluate Limit)
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
I'm not really understanding this, I attempted this for the last 30 minutes... \(\ \Huge \lim_{(x \rightarrow 7)} \frac{\sqrt{x+2}-3}{x-7} \)
experimentX
  • experimentX
rationalze it ... or use l'hospital rule
experimentX
  • experimentX
*rationalize numerator

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anonymous
  • anonymous
|dw:1339357875786:dw|
anonymous
  • anonymous
How would I rationalize?
zepp
  • zepp
Multiply by the conjugate of the denominator.
anonymous
  • anonymous
|dw:1339358153740:dw|
anonymous
  • anonymous
So, multiplying by the conjugate yields: |dw:1339358330856:dw|
experimentX
  • experimentX
cancel out (x-7) on both numerator and denominator ... and put the value x
anonymous
  • anonymous
Got it! Thanks all!
zepp
  • zepp
It's numerator here, not denom :x http://puu.sh/A3Vb Sorry about it, lol

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