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anonymous
 4 years ago
Find the limit as x approaches 4, using an algebraic method (not derivation).
[sqrt(x^21)sqrt(15)]/(x4)
anonymous
 4 years ago
Find the limit as x approaches 4, using an algebraic method (not derivation). [sqrt(x^21)sqrt(15)]/(x4)

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327344927815:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Drawing is for clarification.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0multiply top and bottom by \[\sqrt{x^21}+15\]and you will get it quickly

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0numerator will be \[x^216=(x+4)(x4)\] cancel with the x  4 in the denominator, then replace x by 4

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What about the denominator?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0So it will be (4+4)/(sqrt(15)+sqrt(15)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0That will equal 8/sqrt(30) which isn't the answer I found on wolfram or anything else. All other programs say the answer is 4/sqrt(15)

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.0you have a mistake in simplifying

myininaya
 4 years ago
Best ResponseYou've already chosen the best response.0\[\frac{8}{2 \sqrt{15}} =\frac{4}{\sqrt{15}}\]
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