Limit Question: Simplifying Complex Functions with L'Hopital's Rule

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SUMMARY

The discussion centers on simplifying complex functions using L'Hôpital's Rule. Participants express frustration with the complexity of derivatives involved in applying the rule. A suggestion is made to utilize the Taylor series expansion for the square root function, specifically √(1 + x) = 1 + (1/2)x + (?)x² + (?)x³, as an alternative method for simplification. The conversation emphasizes the importance of careful handling of trigonometric factors during the process.

PREREQUISITES
  • Understanding of L'Hôpital's Rule for limits
  • Familiarity with derivatives of complex functions
  • Knowledge of Taylor series expansions
  • Basic trigonometric functions and their properties
NEXT STEPS
  • Study the application of L'Hôpital's Rule in various limit scenarios
  • Learn about Taylor series and their convergence properties
  • Explore advanced techniques for simplifying complex derivatives
  • Review trigonometric identities and their implications in calculus
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Students and educators in calculus, mathematicians dealing with limits, and anyone seeking to simplify complex functions in mathematical analysis.

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the question and how i tried o solve them
in
http://img206.imageshack.us/img206/8/84758564bu8.gif

i tried lhopital
but its a complex function derivative nightmare

is there an easier way?
 
Last edited by a moderator:
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transgalactic said:
the question and how i tried o solve them
in
http://img206.imageshack.us/img206/8/84758564bu8.gif

i tried lhopital
but its a complex function derivative nightmare

is there an easier way?

it's not a nightmare … you just have to be careful

(and remember you can ignore anything that's gong to end up with a bare tanx or sinx factor the thrid time)

alternatively, you could try using the expansion √(1 + x) = 1 + (1/2)x + (?)x2 + (?)x3
 
Last edited by a moderator:

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